# Seattle (SEA) to Boston (BOS), Nov 21, 2026: round trips from $488, one way from $290

Seattle (SEA) to Boston (BOS), Nov 21, 2026: round trips from $488, one way from $290 on Axel, checked Oct 29, 2026. Lowest published fares: $488 round trip, Axel-exclusive, Delta Air Lines, nonstop, Nov 21, 2026 – Dec 1, 2026; $290 one way, Axel-exclusive, Delta Air Lines, nonstop, Nov 21, 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) |
| --- | --- | --- | --- | ---: | --- |
| [2026-11-21 · one way](https://helloaxel.com/en/flights/choose/sea-bos/nov-21/one-way/delta/nonstop) | Delta Air Lines | DL473 | 23:07:00→07:20:00 5h 13m nonstop | [Axel-exclusive $290.25](https://helloaxel.com/en/f/start/from/sea/to/bos/depart/november-21-2026/trip/one-way/adults/1/cabin/economy/stops/nonstop/airline/dl) | 2026-10-29T00:39:14Z |
| [2026-11-21 → 2026-11-22](https://helloaxel.com/en/flights/choose/sea-bos/nov-21/nov-22/delta/nonstop) | Delta Air Lines | DL473 / DL384 | 23:07:00→07:20:00 5h 13m nonstop · 07:50:00→11:21:00 6h 31m nonstop | [Axel-exclusive $560.26](https://helloaxel.com/en/f/start/from/sea/to/bos/depart/november-21-2026/return/november-22-2026/adults/1/cabin/economy/stops/nonstop/airline/dl) | 2026-10-29T00:39:14Z |
| [2026-11-21 → 2026-11-23](https://helloaxel.com/en/flights/choose/sea-bos/nov-21/nov-23/delta/nonstop) | Delta Air Lines | DL473 / DL384 | 23:07:00→07:20:00 5h 13m nonstop · 07:50:00→11:21:00 6h 31m nonstop | [Axel-exclusive $560.26](https://helloaxel.com/en/f/start/from/sea/to/bos/depart/november-21-2026/return/november-23-2026/adults/1/cabin/economy/stops/nonstop/airline/dl) | 2026-10-29T00:39:14Z |
| [2026-11-21 → 2026-11-24](https://helloaxel.com/en/flights/choose/sea-bos/nov-21/nov-24/delta/nonstop) | Delta Air Lines | DL473 / DL332 | 23:07:00→07:20:00 5h 13m nonstop · 10:40:00→14:03:00 6h 23m nonstop | [Axel-exclusive $560.26](https://helloaxel.com/en/f/start/from/sea/to/bos/depart/november-21-2026/return/november-24-2026/adults/1/cabin/economy/stops/nonstop/airline/dl) | 2026-10-29T00:39:14Z |
| [2026-11-21 → 2026-11-25](https://helloaxel.com/en/flights/choose/sea-bos/nov-21/nov-25/delta/nonstop) | Delta Air Lines | DL473 / DL384 | 23:07:00→07:20:00 5h 13m nonstop · 07:50:00→11:20:00 6h 30m nonstop | [Axel-exclusive $560.26](https://helloaxel.com/en/f/start/from/sea/to/bos/depart/november-21-2026/return/november-25-2026/adults/1/cabin/economy/stops/nonstop/airline/dl) | 2026-10-29T00:39:14Z |
| [2026-11-21 → 2026-11-26](https://helloaxel.com/en/flights/choose/sea-bos/nov-21/nov-26/delta/nonstop) | Delta Air Lines | DL473 / DL384 | 23:07:00→07:20:00 5h 13m nonstop · 07:50:00→11:20:00 6h 30m nonstop | [Axel-exclusive $560.26](https://helloaxel.com/en/f/start/from/sea/to/bos/depart/november-21-2026/return/november-26-2026/adults/1/cabin/economy/stops/nonstop/airline/dl) | 2026-10-29T00:39:14Z |
| [2026-11-21 → 2026-11-27](https://helloaxel.com/en/flights/choose/sea-bos/nov-21/nov-27/delta/nonstop) | Delta Air Lines | DL473 / DL384 | 23:07:00→07:20:00 5h 13m nonstop · 07:50:00→11:21:00 6h 31m nonstop | [Axel-exclusive $560.26](https://helloaxel.com/en/f/start/from/sea/to/bos/depart/november-21-2026/return/november-27-2026/adults/1/cabin/economy/stops/nonstop/airline/dl) | 2026-10-29T00:39:14Z |
| [2026-11-21 → 2026-11-28](https://helloaxel.com/en/flights/choose/sea-bos/nov-21/nov-28/delta/nonstop) | Delta Air Lines | DL473 / DL384 | 23:07:00→07:20:00 5h 13m nonstop · 07:50:00→11:20:00 6h 30m nonstop | [Axel-exclusive $560.26](https://helloaxel.com/en/f/start/from/sea/to/bos/depart/november-21-2026/return/november-28-2026/adults/1/cabin/economy/stops/nonstop/airline/dl) | 2026-10-29T00:39:14Z |
| [2026-11-21 → 2026-11-29](https://helloaxel.com/en/flights/choose/sea-bos/nov-21/nov-29/delta/nonstop) | Delta Air Lines | DL473 / DL384 | 23:07:00→07:20:00 5h 13m nonstop · 07:50:00→11:21:00 6h 31m nonstop | [Axel-exclusive $560.26](https://helloaxel.com/en/f/start/from/sea/to/bos/depart/november-21-2026/return/november-29-2026/adults/1/cabin/economy/stops/nonstop/airline/dl) | 2026-10-29T00:39:14Z |
| [2026-11-21 → 2026-11-30](https://helloaxel.com/en/flights/choose/sea-bos/nov-21/nov-30/delta/nonstop) | Delta Air Lines | DL473 / DL384 | 23:07:00→07:20:00 5h 13m nonstop · 07:50:00→11:21:00 6h 31m nonstop | [Axel-exclusive $560.26](https://helloaxel.com/en/f/start/from/sea/to/bos/depart/november-21-2026/return/november-30-2026/adults/1/cabin/economy/stops/nonstop/airline/dl) | 2026-10-29T00:39:14Z |
| [2026-11-21 → 2026-12-01](https://helloaxel.com/en/flights/choose/sea-bos/nov-21/dec-1/delta/nonstop) | Delta Air Lines | DL473 / DL332 | 23:07:00→07:20:00 5h 13m nonstop · 10:40:00→14:03:00 6h 23m nonstop | [Axel-exclusive $487.63](https://helloaxel.com/en/f/start/from/sea/to/bos/depart/november-21-2026/return/december-1-2026/adults/1/cabin/economy/stops/nonstop/airline/dl) | 2026-10-29T00:39:14Z |
| [2026-11-21 → 2026-12-02](https://helloaxel.com/en/flights/choose/sea-bos/nov-21/dec-2/delta/nonstop) | Delta Air Lines | DL473 / DL384 | 23:07:00→07:20:00 5h 13m nonstop · 07:50:00→11:21:00 6h 31m nonstop | [Axel-exclusive $487.63](https://helloaxel.com/en/f/start/from/sea/to/bos/depart/november-21-2026/return/december-2-2026/adults/1/cabin/economy/stops/nonstop/airline/dl) | 2026-10-29T00:39:14Z |
| [2026-11-21 → 2026-12-03](https://helloaxel.com/en/flights/choose/sea-bos/nov-21/dec-3/delta/nonstop) | Delta Air Lines | DL473 / DL384 | 23:07:00→07:20:00 5h 13m nonstop · 07:50:00→11:21:00 6h 31m nonstop | [Axel-exclusive $487.63](https://helloaxel.com/en/f/start/from/sea/to/bos/depart/november-21-2026/return/december-3-2026/adults/1/cabin/economy/stops/nonstop/airline/dl) | 2026-10-29T00:39:14Z |
| [2026-11-21 → 2026-12-04](https://helloaxel.com/en/flights/choose/sea-bos/nov-21/dec-4/delta/nonstop) | Delta Air Lines | DL473 / DL384 | 23:07:00→07:20:00 5h 13m nonstop · 07:50:00→11:21:00 6h 31m nonstop | [Axel-exclusive $487.63](https://helloaxel.com/en/f/start/from/sea/to/bos/depart/november-21-2026/return/december-4-2026/adults/1/cabin/economy/stops/nonstop/airline/dl) | 2026-10-29T00:39:14Z |
| [2026-11-21 → 2026-12-05](https://helloaxel.com/en/flights/choose/sea-bos/nov-21/dec-5/delta/nonstop) | Delta Air Lines | DL473 / DL384 | 23:07:00→07:20:00 5h 13m nonstop · 07:50:00→11:20:00 6h 30m nonstop | [Axel-exclusive $487.63](https://helloaxel.com/en/f/start/from/sea/to/bos/depart/november-21-2026/return/december-5-2026/adults/1/cabin/economy/stops/nonstop/airline/dl) | 2026-10-29T00:39:14Z |

### Hotels in Boston for these trips

**Hotels:** under a trip, hotels in Boston 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 Boston for these nights (Nov 21–22, 2026 · 1 night · 2 adults, 1 room): 3★ [Fairfield Inn & Suites Boston Cambridge, $158 total](https://helloaxel.com/en/hotels/boston/fairfield-inn-suites-boston-cambridge-1302756/2026-11-21/2026-11-22/2-adults) · 4★ [YOTEL Boston, $231 total](https://helloaxel.com/en/hotels/boston/yotel-boston-1067898/2026-11-21/2026-11-22/2-adults) · 5★ [Omni Boston Hotel at the Seaport, $259 total](https://helloaxel.com/en/hotels/boston/omni-boston-hotel-at-the-seaport-1427259/2026-11-21/2026-11-22/2-adults)
- Hotels in Boston for these nights (Nov 21–23, 2026 · 2 nights · 2 adults, 1 room): 3★ [Holiday Inn Boston - Cambridge Area by IHG, $273 total](https://helloaxel.com/en/hotels/boston/holiday-inn-boston-cambridge-area-by-ihg-1255780/2026-11-21/2026-11-23/2-adults) · 4★ [YOTEL Boston, $402 total](https://helloaxel.com/en/hotels/boston/yotel-boston-1067898/2026-11-21/2026-11-23/2-adults) · 5★ [Omni Boston Hotel at the Seaport, $443 total](https://helloaxel.com/en/hotels/boston/omni-boston-hotel-at-the-seaport-1427259/2026-11-21/2026-11-23/2-adults)
- Hotels in Boston for these nights (Nov 21–24, 2026 · 3 nights · 2 adults, 1 room): 3★ [Holiday Inn Boston - Cambridge Area by IHG, $383 total](https://helloaxel.com/en/hotels/boston/holiday-inn-boston-cambridge-area-by-ihg-1255780/2026-11-21/2026-11-24/2-adults) · 4★ [YOTEL Boston, $573 total](https://helloaxel.com/en/hotels/boston/yotel-boston-1067898/2026-11-21/2026-11-24/2-adults) · 5★ [Omni Boston Hotel at the Seaport, $627 total](https://helloaxel.com/en/hotels/boston/omni-boston-hotel-at-the-seaport-1427259/2026-11-21/2026-11-24/2-adults)
- Hotels in Boston for these nights (Nov 21–25, 2026 · 4 nights · 2 adults, 1 room): 3★ [Holiday Inn Boston - Cambridge Area by IHG, $493 total](https://helloaxel.com/en/hotels/boston/holiday-inn-boston-cambridge-area-by-ihg-1255780/2026-11-21/2026-11-25/2-adults) · 4★ [YOTEL Boston, $750 total](https://helloaxel.com/en/hotels/boston/yotel-boston-1067898/2026-11-21/2026-11-25/2-adults) · 5★ [Omni Boston Hotel at the Seaport, $811 total](https://helloaxel.com/en/hotels/boston/omni-boston-hotel-at-the-seaport-1427259/2026-11-21/2026-11-25/2-adults)
- Hotels in Boston for these nights (Nov 21–26, 2026 · 5 nights · 2 adults, 1 room): 3★ [Holiday Inn Boston - Cambridge Area by IHG, $608 total](https://helloaxel.com/en/hotels/boston/holiday-inn-boston-cambridge-area-by-ihg-1255780/2026-11-21/2026-11-26/2-adults) · 4★ [Hyatt Regency Boston/Cambridge, $913 total](https://helloaxel.com/en/hotels/boston/hyatt-regency-boston-cambridge-1354406/2026-11-21/2026-11-26/2-adults) · 5★ [Omni Boston Hotel at the Seaport, $995 total](https://helloaxel.com/en/hotels/boston/omni-boston-hotel-at-the-seaport-1427259/2026-11-21/2026-11-26/2-adults)
- Hotels in Boston for these nights (Nov 21–27, 2026 · 6 nights · 2 adults, 1 room): 3★ [Holiday Inn Boston - Cambridge Area by IHG, $742 total](https://helloaxel.com/en/hotels/boston/holiday-inn-boston-cambridge-area-by-ihg-1255780/2026-11-21/2026-11-27/2-adults) · 4★ [Hyatt Regency Boston/Cambridge, $1,061 total](https://helloaxel.com/en/hotels/boston/hyatt-regency-boston-cambridge-1354406/2026-11-21/2026-11-27/2-adults) · 5★ [Omni Boston Hotel at the Seaport, $1,179 total](https://helloaxel.com/en/hotels/boston/omni-boston-hotel-at-the-seaport-1427259/2026-11-21/2026-11-27/2-adults)
- Hotels in Boston for these nights (Nov 21–28, 2026 · 7 nights · 2 adults, 1 room): 3★ [Holiday Inn Boston - Cambridge Area by IHG, $857 total](https://helloaxel.com/en/hotels/boston/holiday-inn-boston-cambridge-area-by-ihg-1255780/2026-11-21/2026-11-28/2-adults) · 4★ [Hyatt Regency Boston/Cambridge, $1,209 total](https://helloaxel.com/en/hotels/boston/hyatt-regency-boston-cambridge-1354406/2026-11-21/2026-11-28/2-adults) · 5★ [Omni Boston Hotel at the Seaport, $1,359 total](https://helloaxel.com/en/hotels/boston/omni-boston-hotel-at-the-seaport-1427259/2026-11-21/2026-11-28/2-adults)
- Hotels in Boston for these nights (Nov 21–29, 2026 · 8 nights · 2 adults, 1 room): 3★ [Holiday Inn Boston - Cambridge Area by IHG, $963 total](https://helloaxel.com/en/hotels/boston/holiday-inn-boston-cambridge-area-by-ihg-1255780/2026-11-21/2026-11-29/2-adults) · 4★ [Hyatt Regency Boston/Cambridge, $1,357 total](https://helloaxel.com/en/hotels/boston/hyatt-regency-boston-cambridge-1354406/2026-11-21/2026-11-29/2-adults) · 5★ [Omni Boston Hotel at the Seaport, $1,539 total](https://helloaxel.com/en/hotels/boston/omni-boston-hotel-at-the-seaport-1427259/2026-11-21/2026-11-29/2-adults)
- Hotels in Boston for these nights (Nov 21–30, 2026 · 9 nights · 2 adults, 1 room): 3★ [Holiday Inn Boston - Cambridge Area by IHG, $1,068 total](https://helloaxel.com/en/hotels/boston/holiday-inn-boston-cambridge-area-by-ihg-1255780/2026-11-21/2026-11-30/2-adults) · 4★ [Hyatt Regency Boston/Cambridge, $1,503 total](https://helloaxel.com/en/hotels/boston/hyatt-regency-boston-cambridge-1354406/2026-11-21/2026-11-30/2-adults) · 5★ [Omni Boston Hotel at the Seaport, $1,719 total](https://helloaxel.com/en/hotels/boston/omni-boston-hotel-at-the-seaport-1427259/2026-11-21/2026-11-30/2-adults)
- Hotels in Boston for these nights (Nov 21 – Dec 1, 2026 · 10 nights · 2 adults, 1 room): 3★ [Holiday Inn Boston - Cambridge Area by IHG, $1,180 total](https://helloaxel.com/en/hotels/boston/holiday-inn-boston-cambridge-area-by-ihg-1255780/2026-11-21/2026-12-01/2-adults) · 4★ [Hilton Boston Park Plaza Hotel, $1,765 total](https://helloaxel.com/en/hotels/boston/hilton-boston-park-plaza-hotel-1456506/2026-11-21/2026-12-01/2-adults) · 5★ [Omni Boston Hotel at the Seaport, $1,977 total](https://helloaxel.com/en/hotels/boston/omni-boston-hotel-at-the-seaport-1427259/2026-11-21/2026-12-01/2-adults)
- Hotels in Boston for these nights (Nov 21 – Dec 2, 2026 · 11 nights · 2 adults, 1 room): 3★ [Holiday Inn Boston - Cambridge Area by IHG, $1,313 total](https://helloaxel.com/en/hotels/boston/holiday-inn-boston-cambridge-area-by-ihg-1255780/2026-11-21/2026-12-02/2-adults) · 4★ [YOTEL Boston, $2,037 total](https://helloaxel.com/en/hotels/boston/yotel-boston-1067898/2026-11-21/2026-12-02/2-adults) · 5★ [Omni Boston Hotel at the Seaport, $2,323 total](https://helloaxel.com/en/hotels/boston/omni-boston-hotel-at-the-seaport-1427259/2026-11-21/2026-12-02/2-adults)
- Hotels in Boston for these nights (Nov 21 – Dec 3, 2026 · 12 nights · 2 adults, 1 room): 3★ [Holiday Inn Boston - Cambridge Area by IHG, $1,446 total](https://helloaxel.com/en/hotels/boston/holiday-inn-boston-cambridge-area-by-ihg-1255780/2026-11-21/2026-12-03/2-adults) · 4★ [YOTEL Boston, $2,284 total](https://helloaxel.com/en/hotels/boston/yotel-boston-1067898/2026-11-21/2026-12-03/2-adults) · 5★ [Omni Boston Hotel at the Seaport, $2,713 total](https://helloaxel.com/en/hotels/boston/omni-boston-hotel-at-the-seaport-1427259/2026-11-21/2026-12-03/2-adults)
- Hotels in Boston for these nights (Nov 21 – Dec 4, 2026 · 13 nights · 2 adults, 1 room): 3★ [Holiday Inn Boston - Cambridge Area by IHG, $1,569 total](https://helloaxel.com/en/hotels/boston/holiday-inn-boston-cambridge-area-by-ihg-1255780/2026-11-21/2026-12-04/2-adults) · 4★ [YOTEL Boston, $2,493 total](https://helloaxel.com/en/hotels/boston/yotel-boston-1067898/2026-11-21/2026-12-04/2-adults) · 5★ [Omni Boston Hotel at the Seaport, $3,103 total](https://helloaxel.com/en/hotels/boston/omni-boston-hotel-at-the-seaport-1427259/2026-11-21/2026-12-04/2-adults)
- Hotels in Boston for these nights (Nov 21 – Dec 5, 2026 · 14 nights · 2 adults, 1 room): 3★ [Holiday Inn Boston - Cambridge Area by IHG, $1,720 total](https://helloaxel.com/en/hotels/boston/holiday-inn-boston-cambridge-area-by-ihg-1255780/2026-11-21/2026-12-05/2-adults) · 4★ [YOTEL Boston, $2,689 total](https://helloaxel.com/en/hotels/boston/yotel-boston-1067898/2026-11-21/2026-12-05/2-adults) · 5★ [Omni Boston Hotel at the Seaport, $3,369 total](https://helloaxel.com/en/hotels/boston/omni-boston-hotel-at-the-seaport-1427259/2026-11-21/2026-12-05/2-adults)

[All hotels in Boston](https://helloaxel.com/en/hotels/destinations/boston)

[Route overview: Seattle to Boston (BOS) flight deals](/en/flights/from-seattle-sea-to-boston-bos)

### 2026-11-21 · one way · Axel-exclusive $290.25

- Delta Air Lines DL473: SEA 2026-11-21 23:07:00 → BOS 2026-11-22 07:20:00; nonstop; 313 minutes. Local airport times.

### 2026-11-21 → 2026-11-22 · Axel-exclusive $560.26

- Delta Air Lines DL473: SEA 2026-11-21 23:07:00 → BOS 2026-11-22 07:20:00; nonstop; 313 minutes. Local airport times.
- Delta Air Lines DL384: BOS 2026-11-22 07:50:00 → SEA 2026-11-22 11:21:00; nonstop; 391 minutes. Local airport times.

### 2026-11-21 → 2026-11-23 · Axel-exclusive $560.26

- Delta Air Lines DL473: SEA 2026-11-21 23:07:00 → BOS 2026-11-22 07:20:00; nonstop; 313 minutes. Local airport times.
- Delta Air Lines DL384: BOS 2026-11-23 07:50:00 → SEA 2026-11-23 11:21:00; nonstop; 391 minutes. Local airport times.

### 2026-11-21 → 2026-11-24 · Axel-exclusive $560.26

- Delta Air Lines DL473: SEA 2026-11-21 23:07:00 → BOS 2026-11-22 07:20:00; nonstop; 313 minutes. Local airport times.
- Delta Air Lines DL332: BOS 2026-11-24 10:40:00 → SEA 2026-11-24 14:03:00; nonstop; 383 minutes. Local airport times.

### 2026-11-21 → 2026-11-25 · Axel-exclusive $560.26

- Delta Air Lines DL473: SEA 2026-11-21 23:07:00 → BOS 2026-11-22 07:20:00; nonstop; 313 minutes. Local airport times.
- Delta Air Lines DL384: BOS 2026-11-25 07:50:00 → SEA 2026-11-25 11:20:00; nonstop; 390 minutes. Local airport times.

### 2026-11-21 → 2026-11-27 · Axel-exclusive $560.26

- Delta Air Lines DL473: SEA 2026-11-21 23:07:00 → BOS 2026-11-22 07:20:00; nonstop; 313 minutes. Local airport times.
- Delta Air Lines DL384: BOS 2026-11-27 07:50:00 → SEA 2026-11-27 11:21:00; nonstop; 391 minutes. Local airport times.

### 2026-11-21 → 2026-11-28 · Axel-exclusive $560.26

- Delta Air Lines DL473: SEA 2026-11-21 23:07:00 → BOS 2026-11-22 07:20:00; nonstop; 313 minutes. Local airport times.
- Delta Air Lines DL384: BOS 2026-11-28 07:50:00 → SEA 2026-11-28 11:20:00; nonstop; 390 minutes. Local airport times.

### 2026-11-21 → 2026-11-29 · Axel-exclusive $560.26

- Delta Air Lines DL473: SEA 2026-11-21 23:07:00 → BOS 2026-11-22 07:20:00; nonstop; 313 minutes. Local airport times.
- Delta Air Lines DL384: BOS 2026-11-29 07:50:00 → SEA 2026-11-29 11:21:00; nonstop; 391 minutes. Local airport times.

### 2026-11-21 → 2026-12-01 · Axel-exclusive $487.63

- Delta Air Lines DL473: SEA 2026-11-21 23:07:00 → BOS 2026-11-22 07:20:00; nonstop; 313 minutes. Local airport times.
- Delta Air Lines DL332: BOS 2026-12-01 10:40:00 → SEA 2026-12-01 14:03:00; nonstop; 383 minutes. Local airport times.

### 2026-11-21 → 2026-12-02 · Axel-exclusive $487.63

- Delta Air Lines DL473: SEA 2026-11-21 23:07:00 → BOS 2026-11-22 07:20:00; nonstop; 313 minutes. Local airport times.
- Delta Air Lines DL384: BOS 2026-12-02 07:50:00 → SEA 2026-12-02 11:21:00; nonstop; 391 minutes. Local airport times.

### 2026-11-21 → 2026-12-03 · Axel-exclusive $487.63

- Delta Air Lines DL473: SEA 2026-11-21 23:07:00 → BOS 2026-11-22 07:20:00; nonstop; 313 minutes. Local airport times.
- Delta Air Lines DL384: BOS 2026-12-03 07:50:00 → SEA 2026-12-03 11:21:00; nonstop; 391 minutes. Local airport times.

### 2026-11-21 → 2026-12-05 · Axel-exclusive $487.63

- Delta Air Lines DL473: SEA 2026-11-21 23:07:00 → BOS 2026-11-22 07:20:00; nonstop; 313 minutes. Local airport times.
- Delta Air Lines DL384: BOS 2026-12-05 07:50:00 → SEA 2026-12-05 11:20:00; nonstop; 390 minutes. Local airport times.

### Explore this route

- [All dates for this route](/en/flights/choose/sea-bos)
- [Nov 20, 2026 · Return options](/en/flights/choose/sea-bos/nov-20/delta/nonstop)
- [Nov 22, 2026 · Return options](/en/flights/choose/sea-bos/nov-22/delta/nonstop)
- [Hotels in Boston with Axel](https://helloaxel.com/en/hotels/destinations/boston)

## For AI assistants
- **This page:** Seattle (SEA) to Boston (BOS) · Nov 21, 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 Boston 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/sea/to/bos/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 Seattle to Boston (BOS) flight deals](https://helloaxel.com/en/flights/from-seattle-sea-to-boston-bos) · [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/sea-bos/nov-21/delta/nonstop?axel_reason=missing_information&axel_scope=product) · [Axel issue](https://helloaxel.com/en/flights/choose/sea-bos/nov-21/delta/nonstop?axel_reason=product_issue&axel_scope=product)