Alaska Airlines Flight 31 Deals & Information (2026/2027)

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Alaska Airlines Flight 31 Route Deals From $189

The cheapest prices found with in the last 7 days for return flights were $327 and $189 for one-way flights to Seattle - Tacoma Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Nov 16 - Tue, Nov 17
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$327 Roundtrip, just found
$327
Roundtrip
just found
Select Alaska Airlines flight, departing Mon, Nov 16 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Tue, Nov 17, priced at $327 just found
Mon, Nov 16 - Tue, Nov 17
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$347 Roundtrip, just found
$347
Roundtrip
just found
Select Alaska Airlines flight, departing Mon, Nov 16 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Tue, Nov 17, priced at $347 just found
Mon, Nov 16 - Tue, Nov 17
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$357 Roundtrip, just found
$357
Roundtrip
just found
Select Alaska Airlines flight, departing Mon, Nov 16 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Tue, Nov 17, priced at $357 just found
Thu, Oct 15 - Fri, Oct 16
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$362 Roundtrip, found 6 days ago
$362
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Oct 15 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Fri, Oct 16, priced at $362 found 6 days ago
Mon, Nov 16 - Tue, Nov 17
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$367 Roundtrip, just found
$367
Roundtrip
just found
Select Alaska Airlines flight, departing Mon, Nov 16 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Tue, Nov 17, priced at $367 just found
Mon, Nov 16 - Tue, Nov 17
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$377 Roundtrip, just found
$377
Roundtrip
just found
Select Alaska Airlines flight, departing Mon, Nov 16 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Tue, Nov 17, priced at $377 just found
Mon, Nov 16 - Tue, Nov 17
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$378 Roundtrip, just found
$378
Roundtrip
just found
Select Alaska Airlines flight, departing Mon, Nov 16 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Tue, Nov 17, priced at $378 just found
Fri, Dec 11 - Sat, Dec 12
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$382 Roundtrip, found 9 hours ago
$382
Roundtrip
found 9 hours ago
Select Alaska Airlines flight, departing Fri, Dec 11 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sat, Dec 12, priced at $382 found 9 hours ago
Sat, Oct 24 - Sun, Oct 25
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$387 Roundtrip, found 1 day ago
$387
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Oct 24 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sun, Oct 25, priced at $387 found 1 day ago
Fri, Dec 11 - Sat, Dec 12
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$389 Roundtrip, found 9 hours ago
$389
Roundtrip
found 9 hours ago
Select Alaska Airlines flight, departing Fri, Dec 11 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sat, Dec 12, priced at $389 found 9 hours ago

Frequently asked questions

What route does flight number AS31 take?
Flight number AS31 flies direct from Philadelphia, PA Airport (PHL-Philadelphia Intl.) to SEA. During this trip, you'll be in the air for roughly 6 hours and 2 minutes. It pays to book ahead to get your preferred seat.
What terminal does AS31 fly out of?
Flight number AS31 runs between Philadelphia, PA Airport (PHL-Philadelphia Intl.) and Seattle - Tacoma Intl. Airport (SEA), and travelers with a seat on this flight generally board the plane from Terminal D.
What kind of plane is on flight number AS31?
Prepare to jump on board a Boeing 737-900 if you're taking off on flight AS31. Almost all flights from Philadelphia Airport to Sea-Tac Airport use this type of plane.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your AS31 flight with Travelocity, please visit our Customer Service Portal.