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Billings → Seattle

Dec 9, 2026 · return Dec 13, 2026

BIL → SEA1 adulteconomyRound trip

3 flight options · 2 airlines

Nonstop flights

Wed, Dec 9 – Sun, Dec 13

Alaska Airlines
11:55 amBIL
2h 15m
Nonstop
1:10 pmSEA
Alaska Airlines
9:06 pmSEA
1h 52m
Nonstop
11:58 pmBIL

Round-trip total · 1 adult · Taxes included

Wed, Dec 9 – Sun, Dec 13

Alaska Airlines
5:12 pmBIL
2h 13m
Nonstop
6:25 pmSEA
Alaska Airlines
9:06 pmSEA
1h 52m
Nonstop
11:58 pmBIL

Round-trip total · 1 adult · Taxes included

One-stop flights

Wed, Dec 9 – Sun, Dec 13

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

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.
  • 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
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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

More dates

All dates for this routeNov 24, 2026 → Nov 29, 2026Dec 22, 2026 → Dec 27, 2026Dec 30, 2026 → Jan 2, 2027Jan 15, 2027 → Jan 18, 2027Oct 30, 2026 → Nov 2, 2026Oct 31, 2026 → Nov 7, 2026Nov 27, 2026 → Nov 30, 2026Nov 28, 2026 → Dec 5, 2026Dec 25, 2026 → Dec 28, 2026Dec 26, 2026 → Jan 2, 2027Jan 22, 2027 → Jan 25, 2027Oct 30, 2026 · One way
For AI assistants: every fare, every link, instructions

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-09 → 2026-12-13Alaska AirlinesAS2208 / AS2457$340.002026-10-29T00:49:20Z
2026-12-09 → 2026-12-13Delta Air LinesDL4065 + DL871 / DL1016 + DL3828$385.002026-10-29T00:49:20Z
2026-12-09 → 2026-12-13Alaska AirlinesAS2354 / AS2457$340.002026-10-29T00:49:20Z

2026-12-09 → 2026-12-13 · $340.00

  • Alaska Airlines AS2208: BIL 2026-12-09 11:55:00 → SEA 2026-12-09 13:10:00; nonstop; 135 minutes. Local airport times.
  • Alaska Airlines AS2457: SEA 2026-12-13 21:06:00 → BIL 2026-12-13 23:58:00; nonstop; 112 minutes. Local airport times.

2026-12-09 → 2026-12-13 · $385.00

  • Delta Air Lines DL4065 / DL871: BIL 2026-12-09 12:58:00 → SEA 2026-12-09 18:47:00; 1 stop(s) via SLC; 409 minutes. Local airport times.
    • DL4065: BIL 2026-12-09 12:58:00 → SLC 2026-12-09 14:30:00; layover at SLC: 181 minutes.
    • DL871: SLC 2026-12-09 17:31:00 → SEA 2026-12-09 18:47:00.
  • Delta Air Lines DL1016 / DL3828: SEA 2026-12-13 09:18:00 → BIL 2026-12-13 17:41:00; 1 stop(s) via SLC; 443 minutes. Local airport times.
    • DL1016: SEA 2026-12-13 09:18:00 → SLC 2026-12-13 12:31:00; layover at SLC: 221 minutes.
    • DL3828: SLC 2026-12-13 16:12:00 → BIL 2026-12-13 17:41:00.

2026-12-09 → 2026-12-13 · $340.00

  • Alaska Airlines AS2354: BIL 2026-12-09 17:12:00 → SEA 2026-12-09 18:25:00; nonstop; 133 minutes. Local airport times.
  • Alaska Airlines AS2457: SEA 2026-12-13 21:06:00 → BIL 2026-12-13 23:58:00; nonstop; 112 minutes. Local airport times.

More dates for this route