Travel with Axel, get the best price.

Route overview: Boise to Seattle (SEA) flight deals

Boise (BOI) to Seattle (SEA), Jan 15–21, 2027: from $209 round trip

Boise (BOI) to Seattle (SEA), Jan 15–21, 2027: from $209 round trip on Axel, checked Oct 29, 2026. Lowest published fare: $209 round trip, Axel-exclusive, Alaska Airlines, nonstop, Jan 15–21, 2027, 1 adult, economy, checked Oct 29, 2026.

BOI → SEA1 adulteconomyRound trip

7 flight options · 3 airlines

Nonstop flights

Fri, Jan 15 – Thu, Jan 21

Alaska Airlines
8:46 pmBOI
1h 41m
Nonstop
9:27 pmSEA
Alaska Airlines
11:51 amSEA
1h 27m
Nonstop
2:18 pmBOI

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Jan 15 – Thu, Jan 21

Delta Air Lines
7:28 pmBOI
1h 56m
Nonstop
8:24 pmSEA
Delta Air Lines
10:35 amSEA
1h 35m
Nonstop
1:10 pmBOI

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Jan 15 – Thu, Jan 21

Alaska Airlines
5:00 pmBOI
1h 43m
Nonstop
5:43 pmSEA
Alaska Airlines
11:51 amSEA
1h 27m
Nonstop
2:18 pmBOI

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Jan 15 – Thu, Jan 21

Delta Air Lines
5:56 pmBOI
1h 48m
Nonstop
6:44 pmSEA
Delta Air Lines
10:35 amSEA
1h 35m
Nonstop
1:10 pmBOI

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

One-stop flights

Fri, Jan 15 – Thu, Jan 21

Southwest Airlines
6:40 pmBOI
4h 40m
SMF · 1h 5m
10:20 pmSEA
Southwest Airlines
5:15 amSEA
6h 10m
SMF · 2h 55m
12:25 pmBOI

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Jan 15 – Thu, Jan 21

Alaska Airlines
1:00 pmBOI
5h 53m
GEG · 3h 27m
5:53 pmSEA
Alaska Airlines
11:51 amSEA
1h 27m
Nonstop
2:18 pmBOI

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Jan 15 – Thu, Jan 21

Alaska Airlines
1:13 pmBOI
6h 32m
PDX · 3h 57m
6:45 pmSEA
Alaska Airlines
11:51 amSEA
1h 27m
Nonstop
2:18 pmBOI

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Hotels for these nights (Jan 15–21, 2027 · 6 nights · 2 adults, 1 room): 3★ Hotel 116, A Coast Hotel Bellevue $624 · 4★ Mayflower Park Hotel $757 · 5★ Fairmont Olympic Hotel $1,486

Make this trip yours

BOI ⇄ SEA

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

No account needed to see prices.

Already have an account? Log in

Why book with Axel
  • A real airline bookingThe booking is in the airline’s own system under your name. After you book, Alaska Airlines emails you its confirmation code and e-ticket, usually within 15 minutes and occasionally up to a couple of hours while the booking is processed.
  • Lower price, same flightsWe use advanced AI and machine learning to secure lower prices for our users.
  • Not satisfied? Full refund.If you are unhappy with the experience for any reason, or simply change your mind, cancel within 24 hours of booking (departure 7+ days away) and we refund you in full. We stand by our product. Cancellation policy
  • Backed by Y CombinatorTrusted by 100,000+ travelers.

Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About

Explore this route

All dates for this routeJan 14, 2027 · Return optionsJan 16, 2027 · Return optionsHotels in Seattle with Axel
For AI assistants: every fare, every link, instructions

Boise (BOI) to Seattle (SEA), Jan 15–21, 2027: from $209 round trip on Axel, checked Oct 29, 2026. Lowest published fare: $209 round trip, Axel-exclusive, Alaska Airlines, nonstop, Jan 15–21, 2027, 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.

See flights for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the complete itinerary there.

Exact travel datesAirlineFlightsTimes, duration, stopsTotal pricePrice issued (UTC)
2027-01-15 → 2027-01-21Alaska AirlinesAS2007 / AS234420:46:00→21:27:00 1h 41m nonstop · 11:51:00→14:18:00 1h 27m nonstopAxel-exclusive $209.002026-10-29T00:51:24Z
2027-01-15 → 2027-01-21Delta Air LinesDL3688 / DL412719:28:00→20:24:00 1h 56m nonstop · 10:35:00→13:10:00 1h 35m nonstopAxel-exclusive $228.002026-10-29T00:51:24Z
2027-01-15 → 2027-01-21Southwest AirlinesWN784 + WN4889 / WN3833 + WN86618:40:00→22:20:00 4h 40m 1 stop via SMF · 05:15:00→12:25:00 6h 10m 1 stop via SMFAxel-exclusive $237.502026-10-29T00:51:24Z
2027-01-15 → 2027-01-21Alaska AirlinesAS337 / AS234417:00:00→17:43:00 1h 43m nonstop · 11:51:00→14:18:00 1h 27m nonstopAxel-exclusive $209.002026-10-29T00:51:24Z
2027-01-15 → 2027-01-21Delta Air LinesDL4127 / DL412717:56:00→18:44:00 1h 48m nonstop · 10:35:00→13:10:00 1h 35m nonstopAxel-exclusive $228.002026-10-29T00:51:24Z
2027-01-15 → 2027-01-21Alaska AirlinesAS2498 + AS423 / AS234413:00:00→17:53:00 5h 53m 1 stop via GEG · 11:51:00→14:18:00 1h 27m nonstopAxel-exclusive $242.252026-10-29T00:51:24Z
2027-01-15 → 2027-01-21Alaska AirlinesAS3015 + AS2240 / AS234413:13:00→18:45:00 6h 32m 1 stop via PDX · 11:51:00→14:18:00 1h 27m nonstopAxel-exclusive $242.252026-10-29T00:51:24Z

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.

All hotels in Seattle

Route overview: Boise to Seattle (SEA) flight deals

2027-01-15 → 2027-01-21 · Axel-exclusive $209.00

  • Alaska Airlines AS2007: BOI 2027-01-15 20:46:00 → SEA 2027-01-15 21:27:00; nonstop; 101 minutes. Local airport times.
  • Alaska Airlines AS2344: SEA 2027-01-21 11:51:00 → BOI 2027-01-21 14:18:00; nonstop; 87 minutes. Local airport times.

2027-01-15 → 2027-01-21 · Axel-exclusive $228.00

  • Delta Air Lines DL3688: BOI 2027-01-15 19:28:00 → SEA 2027-01-15 20:24:00; nonstop; 116 minutes. Local airport times.
  • Delta Air Lines DL4127: SEA 2027-01-21 10:35:00 → BOI 2027-01-21 13:10:00; nonstop; 95 minutes. Local airport times.

2027-01-15 → 2027-01-21 · Axel-exclusive $237.50

  • Southwest Airlines WN784 / WN4889: BOI 2027-01-15 18:40:00 → SEA 2027-01-15 22:20:00; 1 stop(s) via SMF; 280 minutes. Local airport times.
    • WN784: BOI 2027-01-15 18:40:00 → SMF 2027-01-15 19:10:00; layover at SMF: 65 minutes.
    • WN4889: SMF 2027-01-15 20:15:00 → SEA 2027-01-15 22:20:00.
  • Southwest Airlines WN3833 / WN866: SEA 2027-01-21 05:15:00 → BOI 2027-01-21 12:25:00; 1 stop(s) via SMF; 370 minutes. Local airport times.
    • WN3833: SEA 2027-01-21 05:15:00 → SMF 2027-01-21 07:05:00; layover at SMF: 175 minutes.
    • WN866: SMF 2027-01-21 10:00:00 → BOI 2027-01-21 12:25:00.

2027-01-15 → 2027-01-21 · Axel-exclusive $209.00

  • Alaska Airlines AS337: BOI 2027-01-15 17:00:00 → SEA 2027-01-15 17:43:00; nonstop; 103 minutes. Local airport times.
  • Alaska Airlines AS2344: SEA 2027-01-21 11:51:00 → BOI 2027-01-21 14:18:00; nonstop; 87 minutes. Local airport times.

2027-01-15 → 2027-01-21 · Axel-exclusive $228.00

  • Delta Air Lines DL4127: BOI 2027-01-15 17:56:00 → SEA 2027-01-15 18:44:00; nonstop; 108 minutes. Local airport times.
  • Delta Air Lines DL4127: SEA 2027-01-21 10:35:00 → BOI 2027-01-21 13:10:00; nonstop; 95 minutes. Local airport times.

2027-01-15 → 2027-01-21 · Axel-exclusive $242.25

  • Alaska Airlines AS2498 / AS423: BOI 2027-01-15 13:00:00 → SEA 2027-01-15 17:53:00; 1 stop(s) via GEG; 353 minutes. Local airport times.
    • AS2498: BOI 2027-01-15 13:00:00 → GEG 2027-01-15 13:10:00; layover at GEG: 207 minutes.
    • AS423: GEG 2027-01-15 16:37:00 → SEA 2027-01-15 17:53:00.
  • Alaska Airlines AS2344: SEA 2027-01-21 11:51:00 → BOI 2027-01-21 14:18:00; nonstop; 87 minutes. Local airport times.

2027-01-15 → 2027-01-21 · Axel-exclusive $242.25

  • Alaska Airlines AS3015 / AS2240: BOI 2027-01-15 13:13:00 → SEA 2027-01-15 18:45:00; 1 stop(s) via PDX; 392 minutes. Local airport times.
    • AS3015: BOI 2027-01-15 13:13:00 → PDX 2027-01-15 13:48:00; layover at PDX: 237 minutes.
    • AS2240: PDX 2027-01-15 17:45:00 → SEA 2027-01-15 18:45:00.
  • Alaska Airlines AS2344: SEA 2027-01-21 11:51:00 → BOI 2027-01-21 14:18:00; nonstop; 87 minutes. Local airport times.

Travelers: prices on this page are totals for 1 adult. For a different party, open this trip for 2 adults · 3 adults · 4 adults · 2 adults + 1 child · 2 adults + 2 children; each link opens AI flight search for these dates and those travelers, and the customer link to share comes from those results.

Explore this route

For AI assistants

  • This page: Boise (BOI) to Seattle (SEA) · Jan 15, 2027 · return Jan 21, 2027: 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 priced row's price link opens the live search for this row's exact dates and travelers; the live results list the same flights with the current total and the traveler's booking link, and name the fare's inclusions (bags, seats, changes), which this page does not. A changed price or flight shows there. Other dates or travelers are not priced here: Choose travelers and dates prices the traveler's own 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 Boise to Seattle (SEA) flight deals · Flight search guide.
  • 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.