Travel with Axel,
get the best price.

Seattle → Austin

Dec 21, 2026 · return Dec 31, 2026

SEA → AUS1 adulteconomyRound trip

11 flight options · 5 airlines

Nonstop flights

Mon, Dec 21 – Thu, Dec 31

Southwest Airlines
8:30 amSEA
4h
Nonstop
2:30 pmAUS
Southwest Airlines
3:55 pmAUS
4h 40m
Nonstop
6:35 pmSEA

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Thu, Dec 31

Alaska Airlines
5:11 pmSEA
4h 3m
Nonstop
11:14 pmAUS
Alaska Airlines
3:43 pmAUS
4h 47m
Nonstop
6:30 pmSEA

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Thu, Dec 31

Delta Air Lines
8:43 amSEA
4h 12m
Nonstop
2:55 pmAUS
Delta Air Lines
6:06 pmAUS
4h 43m
Nonstop
8:49 pmSEA

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Thu, Dec 31

Alaska Airlines
8:33 amSEA
4h 7m
Nonstop
2:40 pmAUS
Alaska Airlines
3:43 pmAUS
4h 47m
Nonstop
6:30 pmSEA

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Thu, Dec 31

Delta Air Lines
5:45 pmSEA
4h 9m
Nonstop
11:54 pmAUS
Delta Air Lines
6:06 pmAUS
4h 43m
Nonstop
8:49 pmSEA

Round-trip total · 1 adult · Taxes included

One-stop flights

Mon, Dec 21 – Thu, Dec 31

American Airlines
3:00 pmSEA
6h 59m
PHX · 1h 50m
11:59 pmAUS
American Airlines
6:02 pmAUS
7h 13m
PHX · 1h 18m
11:15 pmSEA

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Thu, Dec 31

United Airlines
11:59 pmSEA
6h 38m
IAH · 1h 19m
8:37 am+1AUS
United Airlines
7:00 amAUS
7h 18m
SFO · 1h
12:18 pmSEA

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Thu, Dec 31

Alaska Airlines
12:33 amSEA
6h 13m
DFW · 1h 5m
8:46 amAUS
Alaska Airlines
3:43 pmAUS
4h 47m
Nonstop
6:30 pmSEA

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Thu, Dec 31

Delta Air Lines
12:31 pmSEA
6h 47m
LAX · 1h 7m
9:18 pmAUS
Delta Air Lines
6:06 pmAUS
4h 43m
Nonstop
8:49 pmSEA

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Thu, Dec 31

Delta Air Lines
11:45 amSEA
6h 59m
BZN · 1h 55m
8:44 pmAUS
Delta Air Lines
6:06 pmAUS
4h 43m
Nonstop
8:49 pmSEA

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Thu, Dec 31

Delta Air Lines
1:25 pmSEA
6h 17m
SLC · 1h 29m
9:42 pmAUS
Delta Air Lines
6:06 pmAUS
4h 43m
Nonstop
8:49 pmSEA

Round-trip total · 1 adult · Taxes included

Make this trip yours

SEA ⇄ AUS

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, Southwest 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

More dates

All dates for this routeNov 20, 2026 → Nov 23, 2026Nov 27, 2026 → Dec 4, 2026Nov 20, 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)
2026-12-21 → 2026-12-31Southwest AirlinesWN4519 / WN425$442.002026-10-29T01:14:23Z
2026-12-21 → 2026-12-31Alaska AirlinesAS375 / AS352$468.002026-10-29T01:14:23Z
2026-12-21 → 2026-12-31Delta Air LinesDL739 / DL831$481.002026-10-29T01:14:23Z
2026-12-21 → 2026-12-31American AirlinesAA2073 + AA1805 / AA1421 + AS612$442.002026-10-29T01:14:23Z
2026-12-21 → 2026-12-31United AirlinesUA2211 + UA2083 / UA2177 + UA2192$455.002026-10-29T01:14:23Z
2026-12-21 → 2026-12-31Alaska AirlinesAS352 / AS352$468.002026-10-29T01:14:23Z
2026-12-21 → 2026-12-31Delta Air LinesDL848 / DL831$481.002026-10-29T01:14:23Z
2026-12-21 → 2026-12-31Alaska AirlinesAS424 + AA6243 / AS352$447.752026-10-29T01:14:23Z
2026-12-21 → 2026-12-31Delta Air LinesDL2914 + DL622 / DL831$467.502026-10-29T01:14:23Z
2026-12-21 → 2026-12-31Delta Air LinesDL4104 + DL3714 / DL831$467.502026-10-29T01:14:23Z
2026-12-21 → 2026-12-31Delta Air LinesDL1120 + DL2728 / DL831$467.502026-10-29T01:14:23Z

2026-12-21 → 2026-12-31 · $442.00

  • Southwest Airlines WN4519: SEA 2026-12-21 08:30:00 → AUS 2026-12-21 14:30:00; nonstop; 240 minutes. Local airport times.
  • Southwest Airlines WN425: AUS 2026-12-31 15:55:00 → SEA 2026-12-31 18:35:00; nonstop; 280 minutes. Local airport times.

2026-12-21 → 2026-12-31 · $468.00

  • Alaska Airlines AS375: SEA 2026-12-21 17:11:00 → AUS 2026-12-21 23:14:00; nonstop; 243 minutes. Local airport times.
  • Alaska Airlines AS352: AUS 2026-12-31 15:43:00 → SEA 2026-12-31 18:30:00; nonstop; 287 minutes. Local airport times.

2026-12-21 → 2026-12-31 · $481.00

  • Delta Air Lines DL739: SEA 2026-12-21 08:43:00 → AUS 2026-12-21 14:55:00; nonstop; 252 minutes. Local airport times.
  • Delta Air Lines DL831: AUS 2026-12-31 18:06:00 → SEA 2026-12-31 20:49:00; nonstop; 283 minutes. Local airport times.

2026-12-21 → 2026-12-31 · $442.00

  • American Airlines AA2073 / AA1805: SEA 2026-12-21 15:00:00 → AUS 2026-12-21 23:59:00; 1 stop(s) via PHX; 419 minutes. Local airport times.
    • AA2073: SEA 2026-12-21 15:00:00 → PHX 2026-12-21 18:52:00; layover at PHX: 110 minutes.
    • AA1805: PHX 2026-12-21 20:42:00 → AUS 2026-12-21 23:59:00.
  • American Airlines AA1421 / AS612: AUS 2026-12-31 18:02:00 → SEA 2026-12-31 23:15:00; 1 stop(s) via PHX; 433 minutes. Local airport times.
    • AA1421: AUS 2026-12-31 18:02:00 → PHX 2026-12-31 19:40:00; layover at PHX: 78 minutes.
    • AS612: PHX 2026-12-31 20:58:00 → SEA 2026-12-31 23:15:00.

2026-12-21 → 2026-12-31 · $455.00

  • United Airlines UA2211 / UA2083: SEA 2026-12-21 23:59:00 → AUS 2026-12-22 08:37:00; 1 stop(s) via IAH; 398 minutes. Local airport times.
    • UA2211: SEA 2026-12-21 23:59:00 → IAH 2026-12-22 06:13:00; layover at IAH: 79 minutes.
    • UA2083: IAH 2026-12-22 07:32:00 → AUS 2026-12-22 08:37:00.
  • United Airlines UA2177 / UA2192: AUS 2026-12-31 07:00:00 → SEA 2026-12-31 12:18:00; 1 stop(s) via SFO; 438 minutes. Local airport times.
    • UA2177: AUS 2026-12-31 07:00:00 → SFO 2026-12-31 09:05:00; layover at SFO: 60 minutes.
    • UA2192: SFO 2026-12-31 10:05:00 → SEA 2026-12-31 12:18:00.

2026-12-21 → 2026-12-31 · $468.00

  • Alaska Airlines AS352: SEA 2026-12-21 08:33:00 → AUS 2026-12-21 14:40:00; nonstop; 247 minutes. Local airport times.
  • Alaska Airlines AS352: AUS 2026-12-31 15:43:00 → SEA 2026-12-31 18:30:00; nonstop; 287 minutes. Local airport times.

2026-12-21 → 2026-12-31 · $481.00

  • Delta Air Lines DL848: SEA 2026-12-21 17:45:00 → AUS 2026-12-21 23:54:00; nonstop; 249 minutes. Local airport times.
  • Delta Air Lines DL831: AUS 2026-12-31 18:06:00 → SEA 2026-12-31 20:49:00; nonstop; 283 minutes. Local airport times.

2026-12-21 → 2026-12-31 · $447.75

  • Alaska Airlines AS424 / AA6243: SEA 2026-12-21 00:33:00 → AUS 2026-12-21 08:46:00; 1 stop(s) via DFW; 373 minutes. Local airport times.
    • AS424: SEA 2026-12-21 00:33:00 → DFW 2026-12-21 06:25:00; layover at DFW: 65 minutes.
    • AA6243: DFW 2026-12-21 07:30:00 → AUS 2026-12-21 08:46:00.
  • Alaska Airlines AS352: AUS 2026-12-31 15:43:00 → SEA 2026-12-31 18:30:00; nonstop; 287 minutes. Local airport times.

2026-12-21 → 2026-12-31 · $467.50

  • Delta Air Lines DL2914 / DL622: SEA 2026-12-21 12:31:00 → AUS 2026-12-21 21:18:00; 1 stop(s) via LAX; 407 minutes. Local airport times.
    • DL2914: SEA 2026-12-21 12:31:00 → LAX 2026-12-21 15:13:00; layover at LAX: 67 minutes.
    • DL622: LAX 2026-12-21 16:20:00 → AUS 2026-12-21 21:18:00.
  • Delta Air Lines DL831: AUS 2026-12-31 18:06:00 → SEA 2026-12-31 20:49:00; nonstop; 283 minutes. Local airport times.

2026-12-21 → 2026-12-31 · $467.50

  • Delta Air Lines DL4104 / DL3714: SEA 2026-12-21 11:45:00 → AUS 2026-12-21 20:44:00; 1 stop(s) via BZN; 419 minutes. Local airport times.
    • DL4104: SEA 2026-12-21 11:45:00 → BZN 2026-12-21 14:29:00; layover at BZN: 115 minutes.
    • DL3714: BZN 2026-12-21 16:24:00 → AUS 2026-12-21 20:44:00.
  • Delta Air Lines DL831: AUS 2026-12-31 18:06:00 → SEA 2026-12-31 20:49:00; nonstop; 283 minutes. Local airport times.

2026-12-21 → 2026-12-31 · $467.50

  • Delta Air Lines DL1120 / DL2728: SEA 2026-12-21 13:25:00 → AUS 2026-12-21 21:42:00; 1 stop(s) via SLC; 377 minutes. Local airport times.
    • DL1120: SEA 2026-12-21 13:25:00 → SLC 2026-12-21 16:26:00; layover at SLC: 89 minutes.
    • DL2728: SLC 2026-12-21 17:55:00 → AUS 2026-12-21 21:42:00.
  • Delta Air Lines DL831: AUS 2026-12-31 18:06:00 → SEA 2026-12-31 20:49:00; nonstop; 283 minutes. Local airport times.

More dates for this route