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

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Alaska Airlines Flight 31 Route Deals From $119

The cheapest prices found with in the last 7 days for return flights were $239 and $119 for one-way flights to Seattle - Tacoma Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Apr 25 - Tue, Apr 28
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$239 Roundtrip, found 3 hours ago
$239
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Sat, Apr 25 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Tue, Apr 28, priced at $239 found 3 hours ago
Tue, Apr 21 - Wed, Apr 29
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$243 Roundtrip, found 1 day ago
$243
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Tue, Apr 21 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Wed, Apr 29, priced at $243 found 1 day ago
Tue, Apr 14 - Wed, Apr 15
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$247 Roundtrip, found 3 days ago
$247
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Tue, Apr 14 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Wed, Apr 15, priced at $247 found 3 days ago
Wed, Apr 8 - Wed, Apr 15
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$247 Roundtrip, found 1 hour ago
$247
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Wed, Apr 8 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Wed, Apr 15, priced at $247 found 1 hour ago
Wed, May 6 - Wed, May 13
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$253 Roundtrip, found 8 hours ago
$253
Roundtrip
found 8 hours ago
Select Alaska Airlines flight, departing Wed, May 6 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Wed, May 13, priced at $253 found 8 hours ago
Tue, Apr 21 - Wed, Apr 29
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$254 Roundtrip, found 8 hours ago
$254
Roundtrip
found 8 hours ago
Select Alaska Airlines flight, departing Tue, Apr 21 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Wed, Apr 29, priced at $254 found 8 hours ago
Wed, Apr 22 - Wed, May 6
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$255 Roundtrip, found 15 hours ago
$255
Roundtrip
found 15 hours ago
Select Alaska Airlines flight, departing Wed, Apr 22 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Wed, May 6, priced at $255 found 15 hours ago
Wed, Apr 29 - Tue, May 5
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$257 Roundtrip, found 2 days ago
$257
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 $257 found 2 days ago
Sat, Apr 25 - Mon, Apr 27
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$258 Roundtrip, found 1 hour ago
$258
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Sat, Apr 25 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Mon, Apr 27, priced at $258 found 1 hour ago
Wed, Apr 15 - Sun, Apr 19
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$264 Roundtrip, just found
$264
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Apr 15 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sun, Apr 19, priced at $264 just found

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.