# Boston (BOS) to Seattle (SEA), Dec 18, 2026: round trips from $414, one way from $155 Boston (BOS) to Seattle (SEA), Dec 18, 2026: round trips from $414, one way from $155 on Axel, checked Oct 29, 2026. Lowest published fares: $414 round trip, Axel-exclusive, Sun Country Airlines / Alaska Airlines, 1 stop, Dec 18–28, 2026; $155 one way, Axel-exclusive, Sun Country Airlines, 1 stop, Dec 18, 2026; 1 adult, economy, checked Oct 29, 2026. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply. **Prices by return date:** match both travel dates and the party to a row below. Each total is for that exact trip, issued at the time shown. **Date links** open published trip details for exploration. **Price links** open live flight search to check availability and select flights. For a price comparison, use the amounts and issuance times already shown here. | Exact travel dates | Airline | Flights | Times, duration, stops | Total price | Price issued (UTC) | | --- | --- | --- | --- | ---: | --- | | [2026-12-18 · one way](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/one-way) | Alaska Airlines | AS215 | 09:00:00→12:37:00 6h 37m nonstop | [Axel-exclusive $215.00](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/trip/one-way/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 · one way](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/one-way) | Sun Country Airlines | SY252 + SY285 | 11:43:00→17:17:00 8h 34m 1 stop via MSP | [Axel-exclusive $155.00](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/trip/one-way/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-19](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-19) | Alaska Airlines | AS215 / AS279 | 09:00:00→12:37:00 6h 37m nonstop · 08:51:00→17:16:00 5h 25m nonstop | [Axel-exclusive $492.00](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-19-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-19](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-19) | Sun Country Airlines / Delta Air Lines | SY252 + SY285 / DL473 | 11:43:00→17:17:00 8h 34m 1 stop via MSP · 23:15:00→07:36:00 5h 21m nonstop | [Axel-exclusive $445.00](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-19-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-20](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-20) | Alaska Airlines | AS215 / AS214 | 09:00:00→12:37:00 6h 37m nonstop · 21:21:00→05:40:00 5h 19m nonstop | [Axel-exclusive $492.00](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-20-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-20](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-20) | Sun Country Airlines / Delta Air Lines | SY252 + SY285 / DL876 | 11:43:00→17:17:00 8h 34m 1 stop via MSP · 15:55:00→00:13:00 5h 18m nonstop | [Axel-exclusive $445.00](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-20-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-21](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-21) | Alaska Airlines | AS215 / AS214 | 09:00:00→12:37:00 6h 37m nonstop · 21:21:00→05:40:00 5h 19m nonstop | [Axel-exclusive $492.00](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-21-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-21](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-21) | Sun Country Airlines / Alaska Airlines | SY252 + SY285 / AS214 | 11:43:00→17:17:00 8h 34m 1 stop via MSP · 21:21:00→05:40:00 5h 19m nonstop | [Axel-exclusive $434.50](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-21-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-22](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-22) | Alaska Airlines | AS215 / AS214 | 09:00:00→12:37:00 6h 37m nonstop · 21:21:00→05:40:00 5h 19m nonstop | [Axel-exclusive $492.00](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-22-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-22](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-22) | Sun Country Airlines / Alaska Airlines | SY252 + SY285 / AS214 | 11:43:00→17:17:00 8h 34m 1 stop via MSP · 21:21:00→05:40:00 5h 19m nonstop | [Axel-exclusive $434.50](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-22-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-23](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-23) | Alaska Airlines | AS215 / AS279 | 09:00:00→12:37:00 6h 37m nonstop · 09:00:00→17:19:00 5h 19m nonstop | [Axel-exclusive $492.00](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-23-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-23](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-23) | Sun Country Airlines / Alaska Airlines | SY252 + SY285 / AS279 | 11:43:00→17:17:00 8h 34m 1 stop via MSP · 09:00:00→17:19:00 5h 19m nonstop | [Axel-exclusive $434.50](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-23-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-24](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-24) | Alaska Airlines | AS215 / AS460 | 09:00:00→12:37:00 6h 37m nonstop · 15:35:00→23:59:00 5h 24m nonstop | [Axel-exclusive $492.00](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-24-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-24](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-24) | Sun Country Airlines / Alaska Airlines | SY252 + SY285 / AS460 | 11:43:00→17:17:00 8h 34m 1 stop via MSP · 15:35:00→23:59:00 5h 24m nonstop | [Axel-exclusive $434.50](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-24-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-25](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-25) | Alaska Airlines | AS215 / AS460 | 09:00:00→12:37:00 6h 37m nonstop · 15:35:00→23:59:00 5h 24m nonstop | [Axel-exclusive $492.00](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-25-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-25](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-25) | Sun Country Airlines / Alaska Airlines | SY252 + SY285 / AS460 | 11:43:00→17:17:00 8h 34m 1 stop via MSP · 15:35:00→23:59:00 5h 24m nonstop | [Axel-exclusive $434.50](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-25-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-26](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-26) | Alaska Airlines | AS215 / AS279 | 09:00:00→12:37:00 6h 37m nonstop · 08:51:00→17:16:00 5h 25m nonstop | [Axel-exclusive $492.00](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-26-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-26](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-26) | Sun Country Airlines / Delta Air Lines | SY252 + SY285 / DL473 | 11:43:00→17:17:00 8h 34m 1 stop via MSP · 23:15:00→07:36:00 5h 21m nonstop | [Axel-exclusive $445.00](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-26-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-27](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-27) | Alaska Airlines | AS215 / AS460 | 09:00:00→12:37:00 6h 37m nonstop · 15:35:00→23:59:00 5h 24m nonstop | [Axel-exclusive $471.50](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-27-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-27](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-27) | Sun Country Airlines / Delta Air Lines | SY252 + SY285 / DL459 | 11:43:00→17:17:00 8h 34m 1 stop via MSP · 07:15:00→15:43:00 5h 28m nonstop | [Axel-exclusive $423.75](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-27-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-28](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-28) | Alaska Airlines | AS215 / AS460 | 09:00:00→12:37:00 6h 37m nonstop · 15:35:00→23:59:00 5h 24m nonstop | [Axel-exclusive $471.50](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-28-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-28](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-28) | Sun Country Airlines / Alaska Airlines | SY252 + SY285 / AS460 | 11:43:00→17:17:00 8h 34m 1 stop via MSP · 15:35:00→23:59:00 5h 24m nonstop | [Axel-exclusive $414.00](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-28-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-29](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-29) | Alaska Airlines | AS215 / AS460 | 09:00:00→12:37:00 6h 37m nonstop · 15:35:00→23:59:00 5h 24m nonstop | [Axel-exclusive $471.50](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-29-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-29](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-29) | Sun Country Airlines / Alaska Airlines | SY252 + SY285 / AS460 | 11:43:00→17:17:00 8h 34m 1 stop via MSP · 15:35:00→23:59:00 5h 24m nonstop | [Axel-exclusive $414.00](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-29-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-30](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-30) | Alaska Airlines | AS215 / AS460 | 09:00:00→12:37:00 6h 37m nonstop · 15:35:00→23:59:00 5h 24m nonstop | [Axel-exclusive $471.50](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-30-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-30](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-30) | Sun Country Airlines / Alaska Airlines | SY252 + SY285 / AS460 | 11:43:00→17:17:00 8h 34m 1 stop via MSP · 15:35:00→23:59:00 5h 24m nonstop | [Axel-exclusive $414.00](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-30-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-31](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-31) | Alaska Airlines | AS215 / AS460 | 09:00:00→12:37:00 6h 37m nonstop · 15:35:00→23:59:00 5h 24m nonstop | [Axel-exclusive $471.50](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-31-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2026-12-31](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/dec-31) | Sun Country Airlines / Alaska Airlines | SY252 + SY285 / AS460 | 11:43:00→17:17:00 8h 34m 1 stop via MSP · 15:35:00→23:59:00 5h 24m nonstop | [Axel-exclusive $414.00](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/december-31-2026/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2027-01-01](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/jan-1) | Alaska Airlines | AS215 / AS460 | 09:00:00→12:37:00 6h 37m nonstop · 15:35:00→23:59:00 5h 24m nonstop | [Axel-exclusive $471.50](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/january-1-2027/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | | [2026-12-18 → 2027-01-01](https://helloaxel.com/en/flights/choose/bos-sea/dec-18/jan-1) | Sun Country Airlines / Alaska Airlines | SY252 + SY285 / AS460 | 11:43:00→17:17:00 8h 34m 1 stop via MSP · 15:35:00→23:59:00 5h 24m nonstop | [Axel-exclusive $414.00](https://helloaxel.com/en/f/start/from/bos/to/sea/depart/december-18-2026/return/january-1-2027/adults/1/cabin/economy) | 2026-10-29T00:52:47Z | ### Hotels in Seattle for these trips **Hotels:** under a trip, hotels in Seattle for exactly those nights link to the hotel pages for 2 adults in 1 room. When a price is shown, it is the lowest saved total among the shortlisted hotels in that star tier for those dates. - Hotels in Seattle for these nights (Dec 18–19, 2026 · 1 night · 2 adults, 1 room): 3★ [Red Lion Hotel Bellevue, $79 total](https://helloaxel.com/en/hotels/seattle/red-lion-hotel-bellevue-1154641/2026-12-18/2026-12-19/2-adults) · 4★ [citizenM Seattle Pioneer Square, $89 total](https://helloaxel.com/en/hotels/seattle/citizenm-seattle-pioneer-square-1255353/2026-12-18/2026-12-19/2-adults) · 5★ [Fairmont Olympic Hotel, $283 total](https://helloaxel.com/en/hotels/seattle/fairmont-olympic-hotel-1082602/2026-12-18/2026-12-19/2-adults) - Hotels in Seattle for these nights (Dec 18–20, 2026 · 2 nights · 2 adults, 1 room): 3★ [Red Lion Hotel Bellevue, $160 total](https://helloaxel.com/en/hotels/seattle/red-lion-hotel-bellevue-1154641/2026-12-18/2026-12-20/2-adults) · 4★ [Hilton Seattle Airport & Conference Center, $210 total](https://helloaxel.com/en/hotels/seattle/hilton-seattle-airport-conference-center-1398398/2026-12-18/2026-12-20/2-adults) · 5★ [Fairmont Olympic Hotel, $570 total](https://helloaxel.com/en/hotels/seattle/fairmont-olympic-hotel-1082602/2026-12-18/2026-12-20/2-adults) - Hotels in Seattle for these nights (Dec 18–21, 2026 · 3 nights · 2 adults, 1 room): 3★ [Red Lion Hotel Bellevue, $236 total](https://helloaxel.com/en/hotels/seattle/red-lion-hotel-bellevue-1154641/2026-12-18/2026-12-21/2-adults) · 4★ [Hilton Seattle Airport & Conference Center, $315 total](https://helloaxel.com/en/hotels/seattle/hilton-seattle-airport-conference-center-1398398/2026-12-18/2026-12-21/2-adults) · 5★ [Fairmont Olympic Hotel, $837 total](https://helloaxel.com/en/hotels/seattle/fairmont-olympic-hotel-1082602/2026-12-18/2026-12-21/2-adults) - Hotels in Seattle for these nights (Dec 18–22, 2026 · 4 nights · 2 adults, 1 room): 3★ [Red Lion Hotel Bellevue, $314 total](https://helloaxel.com/en/hotels/seattle/red-lion-hotel-bellevue-1154641/2026-12-18/2026-12-22/2-adults) · 4★ [citizenM Seattle Pioneer Square, $420 total](https://helloaxel.com/en/hotels/seattle/citizenm-seattle-pioneer-square-1255353/2026-12-18/2026-12-22/2-adults) · 5★ [Fairmont Olympic Hotel, $1,133 total](https://helloaxel.com/en/hotels/seattle/fairmont-olympic-hotel-1082602/2026-12-18/2026-12-22/2-adults) - Hotels in Seattle for these nights (Dec 18–23, 2026 · 5 nights · 2 adults, 1 room): 3★ [Red Lion Hotel Bellevue, $390 total](https://helloaxel.com/en/hotels/seattle/red-lion-hotel-bellevue-1154641/2026-12-18/2026-12-23/2-adults) · 4★ [citizenM Seattle Pioneer Square, $518 total](https://helloaxel.com/en/hotels/seattle/citizenm-seattle-pioneer-square-1255353/2026-12-18/2026-12-23/2-adults) · 5★ [Fairmont Olympic Hotel, $1,434 total](https://helloaxel.com/en/hotels/seattle/fairmont-olympic-hotel-1082602/2026-12-18/2026-12-23/2-adults) - Hotels in Seattle for these nights (Dec 18–24, 2026 · 6 nights · 2 adults, 1 room): 3★ [Red Lion Hotel Bellevue, $468 total](https://helloaxel.com/en/hotels/seattle/red-lion-hotel-bellevue-1154641/2026-12-18/2026-12-24/2-adults) · 4★ [citizenM Seattle Pioneer Square, $624 total](https://helloaxel.com/en/hotels/seattle/citizenm-seattle-pioneer-square-1255353/2026-12-18/2026-12-24/2-adults) · 5★ [Fairmont Olympic Hotel, $1,716 total](https://helloaxel.com/en/hotels/seattle/fairmont-olympic-hotel-1082602/2026-12-18/2026-12-24/2-adults) - Hotels in Seattle for these nights (Dec 18–25, 2026 · 7 nights · 2 adults, 1 room): 3★ [Red Lion Hotel Bellevue, $548 total](https://helloaxel.com/en/hotels/seattle/red-lion-hotel-bellevue-1154641/2026-12-18/2026-12-25/2-adults) · 4★ [Hilton Seattle Airport & Conference Center, $735 total](https://helloaxel.com/en/hotels/seattle/hilton-seattle-airport-conference-center-1398398/2026-12-18/2026-12-25/2-adults) · 5★ [Fairmont Olympic Hotel, $1,990 total](https://helloaxel.com/en/hotels/seattle/fairmont-olympic-hotel-1082602/2026-12-18/2026-12-25/2-adults) - Hotels in Seattle for these nights (Dec 18–26, 2026 · 8 nights · 2 adults, 1 room): 3★ [Red Lion Hotel Bellevue, $627 total](https://helloaxel.com/en/hotels/seattle/red-lion-hotel-bellevue-1154641/2026-12-18/2026-12-26/2-adults) · 4★ [Hilton Seattle Airport & Conference Center, $840 total](https://helloaxel.com/en/hotels/seattle/hilton-seattle-airport-conference-center-1398398/2026-12-18/2026-12-26/2-adults) · 5★ [Fairmont Olympic Hotel, $2,347 total](https://helloaxel.com/en/hotels/seattle/fairmont-olympic-hotel-1082602/2026-12-18/2026-12-26/2-adults) - Hotels in Seattle for these nights (Dec 18–27, 2026 · 9 nights · 2 adults, 1 room): 3★ [Red Lion Hotel Bellevue, $707 total](https://helloaxel.com/en/hotels/seattle/red-lion-hotel-bellevue-1154641/2026-12-18/2026-12-27/2-adults) · 4★ [Hilton Seattle Airport & Conference Center, $945 total](https://helloaxel.com/en/hotels/seattle/hilton-seattle-airport-conference-center-1398398/2026-12-18/2026-12-27/2-adults) · 5★ [Fairmont Olympic Hotel, $2,630 total](https://helloaxel.com/en/hotels/seattle/fairmont-olympic-hotel-1082602/2026-12-18/2026-12-27/2-adults) - Hotels in Seattle for these nights (Dec 18–28, 2026 · 10 nights · 2 adults, 1 room): 3★ [Red Lion Hotel Bellevue, $783 total](https://helloaxel.com/en/hotels/seattle/red-lion-hotel-bellevue-1154641/2026-12-18/2026-12-28/2-adults) · 4★ [Hilton Seattle Airport & Conference Center, $1,050 total](https://helloaxel.com/en/hotels/seattle/hilton-seattle-airport-conference-center-1398398/2026-12-18/2026-12-28/2-adults) · 5★ [Fairmont Olympic Hotel, $2,892 total](https://helloaxel.com/en/hotels/seattle/fairmont-olympic-hotel-1082602/2026-12-18/2026-12-28/2-adults) - Hotels in Seattle for these nights (Dec 18–29, 2026 · 11 nights · 2 adults, 1 room): 3★ [Red Lion Hotel Bellevue, $859 total](https://helloaxel.com/en/hotels/seattle/red-lion-hotel-bellevue-1154641/2026-12-18/2026-12-29/2-adults) · 4★ [Hilton Seattle Airport & Conference Center, $1,155 total](https://helloaxel.com/en/hotels/seattle/hilton-seattle-airport-conference-center-1398398/2026-12-18/2026-12-29/2-adults) · 5★ [Fairmont Olympic Hotel, $3,175 total](https://helloaxel.com/en/hotels/seattle/fairmont-olympic-hotel-1082602/2026-12-18/2026-12-29/2-adults) - Hotels in Seattle for these nights (Dec 18–30, 2026 · 12 nights · 2 adults, 1 room): 3★ [Red Lion Hotel Bellevue, $935 total](https://helloaxel.com/en/hotels/seattle/red-lion-hotel-bellevue-1154641/2026-12-18/2026-12-30/2-adults) · 4★ [Hilton Seattle Airport & Conference Center, $1,258 total](https://helloaxel.com/en/hotels/seattle/hilton-seattle-airport-conference-center-1398398/2026-12-18/2026-12-30/2-adults) · 5★ [Fairmont Olympic Hotel, $3,453 total](https://helloaxel.com/en/hotels/seattle/fairmont-olympic-hotel-1082602/2026-12-18/2026-12-30/2-adults) - Hotels in Seattle for these nights (Dec 18–31, 2026 · 13 nights · 2 adults, 1 room): 3★ [Red Lion Hotel Bellevue, $1,014 total](https://helloaxel.com/en/hotels/seattle/red-lion-hotel-bellevue-1154641/2026-12-18/2026-12-31/2-adults) · 4★ [Hilton Seattle Airport & Conference Center, $1,363 total](https://helloaxel.com/en/hotels/seattle/hilton-seattle-airport-conference-center-1398398/2026-12-18/2026-12-31/2-adults) · 5★ [Fairmont Olympic Hotel, $3,736 total](https://helloaxel.com/en/hotels/seattle/fairmont-olympic-hotel-1082602/2026-12-18/2026-12-31/2-adults) - Hotels in Seattle for these nights (Dec 18 – Jan 1, 2027 · 14 nights · 2 adults, 1 room): 3★ [Red Lion Hotel Bellevue, $1,094 total](https://helloaxel.com/en/hotels/seattle/red-lion-hotel-bellevue-1154641/2026-12-18/2027-01-01/2-adults) · 4★ [Hilton Seattle Airport & Conference Center, $1,468 total](https://helloaxel.com/en/hotels/seattle/hilton-seattle-airport-conference-center-1398398/2026-12-18/2027-01-01/2-adults) · 5★ [Fairmont Olympic Hotel, $4,258 total](https://helloaxel.com/en/hotels/seattle/fairmont-olympic-hotel-1082602/2026-12-18/2027-01-01/2-adults) [All hotels in Seattle](https://helloaxel.com/en/hotels/destinations/seattle) [Route overview: Boston to Seattle (SEA) flight deals](/en/flights/from-boston-to-seattle-sea) ### 2026-12-18 · one way · Axel-exclusive $155.00 - Sun Country Airlines SY252 / SY285: BOS 2026-12-18 11:43:00 → SEA 2026-12-18 17:17:00; 1 stop(s) via MSP; 514 minutes. Local airport times. - SY252: BOS 2026-12-18 11:43:00 → MSP 2026-12-18 14:01:00; layover at MSP: 84 minutes. - SY285: MSP 2026-12-18 15:25:00 → SEA 2026-12-18 17:17:00. ### 2026-12-18 · one way · Axel-exclusive $215.00 - Alaska Airlines AS215: BOS 2026-12-18 09:00:00 → SEA 2026-12-18 12:37:00; nonstop; 397 minutes. Local airport times. ### 2026-12-18 → 2026-12-19 · Axel-exclusive $445.00 - Sun Country Airlines SY252 / SY285: BOS 2026-12-18 11:43:00 → SEA 2026-12-18 17:17:00; 1 stop(s) via MSP; 514 minutes. Local airport times. - SY252: BOS 2026-12-18 11:43:00 → MSP 2026-12-18 14:01:00; layover at MSP: 84 minutes. - SY285: MSP 2026-12-18 15:25:00 → SEA 2026-12-18 17:17:00. - Delta Air Lines DL473: SEA 2026-12-19 23:15:00 → BOS 2026-12-20 07:36:00; nonstop; 321 minutes. Local airport times. ### 2026-12-18 → 2026-12-19 · Axel-exclusive $492.00 - Alaska Airlines AS215: BOS 2026-12-18 09:00:00 → SEA 2026-12-18 12:37:00; nonstop; 397 minutes. Local airport times. - Alaska Airlines AS279: SEA 2026-12-19 08:51:00 → BOS 2026-12-19 17:16:00; nonstop; 325 minutes. Local airport times. ### 2026-12-18 → 2026-12-20 · Axel-exclusive $445.00 - Sun Country Airlines SY252 / SY285: BOS 2026-12-18 11:43:00 → SEA 2026-12-18 17:17:00; 1 stop(s) via MSP; 514 minutes. Local airport times. - SY252: BOS 2026-12-18 11:43:00 → MSP 2026-12-18 14:01:00; layover at MSP: 84 minutes. - SY285: MSP 2026-12-18 15:25:00 → SEA 2026-12-18 17:17:00. - Delta Air Lines DL876: SEA 2026-12-20 15:55:00 → BOS 2026-12-21 00:13:00; nonstop; 318 minutes. Local airport times. ### 2026-12-18 → 2026-12-20 · Axel-exclusive $492.00 - Alaska Airlines AS215: BOS 2026-12-18 09:00:00 → SEA 2026-12-18 12:37:00; nonstop; 397 minutes. Local airport times. - Alaska Airlines AS214: SEA 2026-12-20 21:21:00 → BOS 2026-12-21 05:40:00; nonstop; 319 minutes. Local airport times. ### 2026-12-18 → 2026-12-21 · Axel-exclusive $434.50 - Sun Country Airlines SY252 / SY285: BOS 2026-12-18 11:43:00 → SEA 2026-12-18 17:17:00; 1 stop(s) via MSP; 514 minutes. Local airport times. - SY252: BOS 2026-12-18 11:43:00 → MSP 2026-12-18 14:01:00; layover at MSP: 84 minutes. - SY285: MSP 2026-12-18 15:25:00 → SEA 2026-12-18 17:17:00. - Alaska Airlines AS214: SEA 2026-12-21 21:21:00 → BOS 2026-12-22 05:40:00; nonstop; 319 minutes. Local airport times. ### 2026-12-18 → 2026-12-21 · Axel-exclusive $492.00 - Alaska Airlines AS215: BOS 2026-12-18 09:00:00 → SEA 2026-12-18 12:37:00; nonstop; 397 minutes. Local airport times. - Alaska Airlines AS214: SEA 2026-12-21 21:21:00 → BOS 2026-12-22 05:40:00; nonstop; 319 minutes. Local airport times. ### 2026-12-18 → 2026-12-22 · Axel-exclusive $434.50 - Sun Country Airlines SY252 / SY285: BOS 2026-12-18 11:43:00 → SEA 2026-12-18 17:17:00; 1 stop(s) via MSP; 514 minutes. Local airport times. - SY252: BOS 2026-12-18 11:43:00 → MSP 2026-12-18 14:01:00; layover at MSP: 84 minutes. - SY285: MSP 2026-12-18 15:25:00 → SEA 2026-12-18 17:17:00. - Alaska Airlines AS214: SEA 2026-12-22 21:21:00 → BOS 2026-12-23 05:40:00; nonstop; 319 minutes. Local airport times. ### 2026-12-18 → 2026-12-22 · Axel-exclusive $492.00 - Alaska Airlines AS215: BOS 2026-12-18 09:00:00 → SEA 2026-12-18 12:37:00; nonstop; 397 minutes. Local airport times. - Alaska Airlines AS214: SEA 2026-12-22 21:21:00 → BOS 2026-12-23 05:40:00; nonstop; 319 minutes. Local airport times. ### 2026-12-18 → 2026-12-24 · Axel-exclusive $434.50 - Sun Country Airlines SY252 / SY285: BOS 2026-12-18 11:43:00 → SEA 2026-12-18 17:17:00; 1 stop(s) via MSP; 514 minutes. Local airport times. - SY252: BOS 2026-12-18 11:43:00 → MSP 2026-12-18 14:01:00; layover at MSP: 84 minutes. - SY285: MSP 2026-12-18 15:25:00 → SEA 2026-12-18 17:17:00. - Alaska Airlines AS460: SEA 2026-12-24 15:35:00 → BOS 2026-12-24 23:59:00; nonstop; 324 minutes. Local airport times. ### 2026-12-18 → 2026-12-24 · Axel-exclusive $492.00 - Alaska Airlines AS215: BOS 2026-12-18 09:00:00 → SEA 2026-12-18 12:37:00; nonstop; 397 minutes. Local airport times. - Alaska Airlines AS460: SEA 2026-12-24 15:35:00 → BOS 2026-12-24 23:59:00; nonstop; 324 minutes. Local airport times. ### 2026-12-18 → 2026-12-25 · Axel-exclusive $434.50 - Sun Country Airlines SY252 / SY285: BOS 2026-12-18 11:43:00 → SEA 2026-12-18 17:17:00; 1 stop(s) via MSP; 514 minutes. Local airport times. - SY252: BOS 2026-12-18 11:43:00 → MSP 2026-12-18 14:01:00; layover at MSP: 84 minutes. - SY285: MSP 2026-12-18 15:25:00 → SEA 2026-12-18 17:17:00. - Alaska Airlines AS460: SEA 2026-12-25 15:35:00 → BOS 2026-12-25 23:59:00; nonstop; 324 minutes. Local airport times. ### 2026-12-18 → 2026-12-25 · Axel-exclusive $492.00 - Alaska Airlines AS215: BOS 2026-12-18 09:00:00 → SEA 2026-12-18 12:37:00; nonstop; 397 minutes. Local airport times. - Alaska Airlines AS460: SEA 2026-12-25 15:35:00 → BOS 2026-12-25 23:59:00; nonstop; 324 minutes. Local airport times. ### 2026-12-18 → 2026-12-26 · Axel-exclusive $445.00 - Sun Country Airlines SY252 / SY285: BOS 2026-12-18 11:43:00 → SEA 2026-12-18 17:17:00; 1 stop(s) via MSP; 514 minutes. Local airport times. - SY252: BOS 2026-12-18 11:43:00 → MSP 2026-12-18 14:01:00; layover at MSP: 84 minutes. - SY285: MSP 2026-12-18 15:25:00 → SEA 2026-12-18 17:17:00. - Delta Air Lines DL473: SEA 2026-12-26 23:15:00 → BOS 2026-12-27 07:36:00; nonstop; 321 minutes. Local airport times. ### 2026-12-18 → 2026-12-26 · Axel-exclusive $492.00 - Alaska Airlines AS215: BOS 2026-12-18 09:00:00 → SEA 2026-12-18 12:37:00; nonstop; 397 minutes. Local airport times. - Alaska Airlines AS279: SEA 2026-12-26 08:51:00 → BOS 2026-12-26 17:16:00; nonstop; 325 minutes. Local airport times. ### 2026-12-18 → 2026-12-28 · Axel-exclusive $414.00 - Sun Country Airlines SY252 / SY285: BOS 2026-12-18 11:43:00 → SEA 2026-12-18 17:17:00; 1 stop(s) via MSP; 514 minutes. Local airport times. - SY252: BOS 2026-12-18 11:43:00 → MSP 2026-12-18 14:01:00; layover at MSP: 84 minutes. - SY285: MSP 2026-12-18 15:25:00 → SEA 2026-12-18 17:17:00. - Alaska Airlines AS460: SEA 2026-12-28 15:35:00 → BOS 2026-12-28 23:59:00; nonstop; 324 minutes. Local airport times. ### 2026-12-18 → 2026-12-28 · Axel-exclusive $471.50 - Alaska Airlines AS215: BOS 2026-12-18 09:00:00 → SEA 2026-12-18 12:37:00; nonstop; 397 minutes. Local airport times. - Alaska Airlines AS460: SEA 2026-12-28 15:35:00 → BOS 2026-12-28 23:59:00; nonstop; 324 minutes. Local airport times. ### 2026-12-18 → 2026-12-29 · Axel-exclusive $414.00 - Sun Country Airlines SY252 / SY285: BOS 2026-12-18 11:43:00 → SEA 2026-12-18 17:17:00; 1 stop(s) via MSP; 514 minutes. Local airport times. - SY252: BOS 2026-12-18 11:43:00 → MSP 2026-12-18 14:01:00; layover at MSP: 84 minutes. - SY285: MSP 2026-12-18 15:25:00 → SEA 2026-12-18 17:17:00. - Alaska Airlines AS460: SEA 2026-12-29 15:35:00 → BOS 2026-12-29 23:59:00; nonstop; 324 minutes. Local airport times. ### 2026-12-18 → 2026-12-29 · Axel-exclusive $471.50 - Alaska Airlines AS215: BOS 2026-12-18 09:00:00 → SEA 2026-12-18 12:37:00; nonstop; 397 minutes. Local airport times. - Alaska Airlines AS460: SEA 2026-12-29 15:35:00 → BOS 2026-12-29 23:59:00; nonstop; 324 minutes. Local airport times. ### 2026-12-18 → 2026-12-30 · Axel-exclusive $414.00 - Sun Country Airlines SY252 / SY285: BOS 2026-12-18 11:43:00 → SEA 2026-12-18 17:17:00; 1 stop(s) via MSP; 514 minutes. Local airport times. - SY252: BOS 2026-12-18 11:43:00 → MSP 2026-12-18 14:01:00; layover at MSP: 84 minutes. - SY285: MSP 2026-12-18 15:25:00 → SEA 2026-12-18 17:17:00. - Alaska Airlines AS460: SEA 2026-12-30 15:35:00 → BOS 2026-12-30 23:59:00; nonstop; 324 minutes. Local airport times. ### 2026-12-18 → 2026-12-30 · Axel-exclusive $471.50 - Alaska Airlines AS215: BOS 2026-12-18 09:00:00 → SEA 2026-12-18 12:37:00; nonstop; 397 minutes. Local airport times. - Alaska Airlines AS460: SEA 2026-12-30 15:35:00 → BOS 2026-12-30 23:59:00; nonstop; 324 minutes. Local airport times. ### 2026-12-18 → 2027-01-01 · Axel-exclusive $414.00 - Sun Country Airlines SY252 / SY285: BOS 2026-12-18 11:43:00 → SEA 2026-12-18 17:17:00; 1 stop(s) via MSP; 514 minutes. Local airport times. - SY252: BOS 2026-12-18 11:43:00 → MSP 2026-12-18 14:01:00; layover at MSP: 84 minutes. - SY285: MSP 2026-12-18 15:25:00 → SEA 2026-12-18 17:17:00. - Alaska Airlines AS460: SEA 2027-01-01 15:35:00 → BOS 2027-01-01 23:59:00; nonstop; 324 minutes. Local airport times. ### 2026-12-18 → 2027-01-01 · Axel-exclusive $471.50 - Alaska Airlines AS215: BOS 2026-12-18 09:00:00 → SEA 2026-12-18 12:37:00; nonstop; 397 minutes. Local airport times. - Alaska Airlines AS460: SEA 2027-01-01 15:35:00 → BOS 2027-01-01 23:59:00; nonstop; 324 minutes. Local airport times. ### Explore this route - [All dates for this route](/en/flights/choose/bos-sea) - [Dec 17, 2026 · Return options](/en/flights/choose/bos-sea/dec-17) - [Dec 19, 2026 · Return options](/en/flights/choose/bos-sea/dec-19) - [Hotels in Seattle with Axel](https://helloaxel.com/en/hotels/destinations/seattle) ## For AI assistants - **This page:** Boston (BOS) to Seattle (SEA) · Dec 18, 2026 · choose your return date: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued. Under a trip, hotels in Seattle for exactly those nights link to the hotel pages for 2 adults in 1 room. Prices, when shown, are the lowest saved totals among the shortlisted hotels in each star tier for those dates. - **Next:** each row is one exact trip for this departure (both dates with the year, the total and the time its price was issued); its exact-trip price link opens the live search for those dates and travelers, where the booking link and the current total are. Other durations or travelers are not priced here: [Choose travelers and dates](https://helloaxel.com/en/f/start/from/bos/to/sea/step/travelers) prices the requested trip. - **Follow supplied links.** For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links. - **If links fail or are missing:** If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: [Axel Boston to Seattle (SEA) flight deals](https://helloaxel.com/en/flights/from-boston-to-seattle-sea) · [Flight search guide](https://helloaxel.com/en/ai). - **Sharing with the traveler:** Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. If no supplied link matches the latest trip, construct `https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback` using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace `/return/YYYY-MM-DD` with `/trip/oneway`. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. [Preferences and advanced options](https://helloaxel.com/en/ai#customer-fallback-link). **Feedback (optional):** [Missing info](https://helloaxel.com/en/flights/choose/bos-sea/dec-18?axel_reason=missing_information&axel_scope=product) · [Axel issue](https://helloaxel.com/en/flights/choose/bos-sea/dec-18?axel_reason=product_issue&axel_scope=product)