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

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Alaska Airlines Flight 31 Route Deals From $149

The cheapest prices found with in the last 7 days for return flights were $248 and $149 for one-way flights to Seattle - Tacoma Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Apr 29 - Tue, May 12
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$248 Roundtrip, found 2 days ago
$248
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Wed, Apr 29 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Tue, May 12, priced at $248 found 2 days ago
Wed, Apr 29 - Tue, May 5
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$249 Roundtrip, found 2 days ago
$249
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Wed, Apr 29 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Tue, May 5, priced at $249 found 2 days ago
Wed, Apr 29 - Tue, May 12
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$268 Roundtrip, found 2 days ago
$268
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Wed, Apr 29 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Tue, May 12, priced at $268 found 2 days ago
Sat, May 2 - Wed, May 6
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$270 Roundtrip, found 2 days ago
$270
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat, May 2 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Wed, May 6, priced at $270 found 2 days ago
Wed, Apr 29 - Wed, May 6
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$275 Roundtrip, found 2 days ago
$275
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Wed, Apr 29 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Wed, May 6, priced at $275 found 2 days ago
Wed, Apr 29 - Sat, May 9
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$275 Roundtrip, found 2 days ago
$275
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Wed, Apr 29 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sat, May 9, priced at $275 found 2 days ago
Wed, Apr 29 - Tue, May 5
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$276 Roundtrip, found 2 days ago
$276
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Wed, Apr 29 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Tue, May 5, priced at $276 found 2 days ago
Tue, May 5 - Tue, May 19
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$293 Roundtrip, found 1 hour ago
$293
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Tue, May 5 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Tue, May 19, priced at $293 found 1 hour ago
Wed, May 6 - Fri, May 8
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$295 Roundtrip, found 2 days ago
$295
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Wed, May 6 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Fri, May 8, priced at $295 found 2 days ago
Sat, May 2 - Wed, May 6
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$297 Roundtrip, found 13 hours ago
$297
Roundtrip
found 13 hours ago
Select Alaska Airlines flight, departing Sat, May 2 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Wed, May 6, priced at $297 found 13 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.