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Route overview: Billings to Seattle (SEA) flight deals

Billings (BIL) to Seattle (SEA), Nov 10–20, 2026: from $340 round trip

Billings (BIL) to Seattle (SEA), Nov 10–20, 2026: from $340 round trip on Axel, checked Oct 29, 2026. Lowest published fare: $340 round trip, Axel-exclusive, Alaska Airlines, nonstop, Nov 10–20, 2026, 1 adult, economy, checked Oct 29, 2026.

BIL → SEA1 adulteconomyRound trip

3 flight options · 2 airlines

Nonstop flights

Tue, Nov 10 – Fri, Nov 20

Alaska Airlines
5:12 pmBIL
2h 13m
Nonstop
6:25 pmSEA
Alaska Airlines
8:04 pmSEA
1h 54m
Nonstop
10:58 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Tue, Nov 10 – Fri, Nov 20

Alaska Airlines
7:18 amBIL
2h 17m
Nonstop
8:35 amSEA
Alaska Airlines
8:04 pmSEA
1h 54m
Nonstop
10:58 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

One-stop flights

Tue, Nov 10 – Fri, Nov 20

Delta Air Lines
12:58 pmBIL
6h 49m
SLC · 3h 1m
6:47 pmSEA
Delta Air Lines
9:18 amSEA
7h 23m
SLC · 3h 41m
5:41 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Hotels for these nights (Nov 10–20, 2026 · 10 nights · 2 adults, 1 room): 3★ The Maxwell Hotel - A Staypineapple Hotel · 4★ The Sound Hotel Seattle Belltown, Tapestry Collection by Hilton · 5★ Four Seasons Hotel Seattle

Make this trip yours

BIL ⇄ SEA

Economy

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

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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.
  • 24-hour cancellationCancel within 24 hours of booking for a full refund when your departure is at least 7 days away. Closer to departure, the airline’s fare rules apply. 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

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For AI assistants: every fare, every link, instructions

Billings (BIL) to Seattle (SEA), Nov 10–20, 2026: from $340 round trip on Axel, checked Oct 29, 2026. Lowest published fare: $340 round trip, Axel-exclusive, Alaska Airlines, nonstop, Nov 10–20, 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.

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)
2026-11-10 → 2026-11-20Alaska AirlinesAS2354 / AS245717:12:00→18:25:00 2h 13m nonstop · 20:04:00→22:58:00 1h 54m nonstopAxel-exclusive $340.002026-10-29T00:49:20Z
2026-11-10 → 2026-11-20Delta Air LinesDL4065 + DL871 / DL1016 + DL382812:58:00→18:47:00 6h 49m 1 stop via SLC · 09:18:00→17:41:00 7h 23m 1 stop via SLCAxel-exclusive $385.002026-10-29T00:49:20Z
2026-11-10 → 2026-11-20Alaska AirlinesAS2336 / AS245707:18:00→08:35:00 2h 17m nonstop · 20:04:00→22:58:00 1h 54m nonstopAxel-exclusive $340.002026-10-29T00:49:20Z

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: Billings to Seattle (SEA) flight deals

2026-11-10 → 2026-11-20 · Axel-exclusive $340.00

  • Alaska Airlines AS2354: BIL 2026-11-10 17:12:00 → SEA 2026-11-10 18:25:00; nonstop; 133 minutes. Local airport times.
  • Alaska Airlines AS2457: SEA 2026-11-20 20:04:00 → BIL 2026-11-20 22:58:00; nonstop; 114 minutes. Local airport times.

2026-11-10 → 2026-11-20 · Axel-exclusive $385.00

  • Delta Air Lines DL4065 / DL871: BIL 2026-11-10 12:58:00 → SEA 2026-11-10 18:47:00; 1 stop(s) via SLC; 409 minutes. Local airport times.
    • DL4065: BIL 2026-11-10 12:58:00 → SLC 2026-11-10 14:30:00; layover at SLC: 181 minutes.
    • DL871: SLC 2026-11-10 17:31:00 → SEA 2026-11-10 18:47:00.
  • Delta Air Lines DL1016 / DL3828: SEA 2026-11-20 09:18:00 → BIL 2026-11-20 17:41:00; 1 stop(s) via SLC; 443 minutes. Local airport times.
    • DL1016: SEA 2026-11-20 09:18:00 → SLC 2026-11-20 12:31:00; layover at SLC: 221 minutes.
    • DL3828: SLC 2026-11-20 16:12:00 → BIL 2026-11-20 17:41:00.

2026-11-10 → 2026-11-20 · Axel-exclusive $340.00

  • Alaska Airlines AS2336: BIL 2026-11-10 07:18:00 → SEA 2026-11-10 08:35:00; nonstop; 137 minutes. Local airport times.
  • Alaska Airlines AS2457: SEA 2026-11-20 20:04:00 → BIL 2026-11-20 22:58:00; nonstop; 114 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: Billings (BIL) to Seattle (SEA) · Nov 10, 2026 · return Nov 20, 2026: 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 Billings 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.