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

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Alaska Airlines Flight 31 Route Deals From $154

The cheapest prices found with in the last 7 days for return flights were $294 and $154 for one-way flights to Seattle - Tacoma Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Jun 3 - Wed, Jun 10
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$294 Roundtrip, found 23 hours ago
$294
Roundtrip
found 23 hours ago
Select Alaska Airlines flight, departing Wed, Jun 3 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Wed, Jun 10, priced at $294 found 23 hours ago
Wed, Jun 3 - Sat, Jun 6
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$299 Roundtrip, just found
$299
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Jun 3 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sat, Jun 6, priced at $299 just found
Fri, May 29 - Sat, May 30
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$304 Roundtrip, found 2 hours ago
$304
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Fri, May 29 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sat, May 30, priced at $304 found 2 hours ago
Sat, Jan 23 - Sat, Jan 30
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$307 Roundtrip, found 1 day ago
$307
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Jan 23 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sat, Jan 30, priced at $307 found 1 day ago
Wed, Jun 3 - Sat, Jun 6
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$309 Roundtrip, just found
$309
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Jun 3 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sat, Jun 6, priced at $309 just found
Sat, May 30 - Sat, Jun 6
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$311 Roundtrip, found 1 hour ago
$311
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Sat, May 30 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sat, Jun 6, priced at $311 found 1 hour ago
Wed, Oct 7 - Wed, Oct 14
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$321 Roundtrip, found 4 hours ago
$321
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Wed, Oct 7 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Wed, Oct 14, priced at $321 found 4 hours ago
Wed, Sep 2 - Sun, Sep 6
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$322 Roundtrip, found 15 hours ago
$322
Roundtrip
found 15 hours ago
Select Alaska Airlines flight, departing Wed, Sep 2 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sun, Sep 6, priced at $322 found 15 hours ago
Wed, Jun 3 - Tue, Jun 9
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$324 Roundtrip, just found
$324
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Jun 3 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Tue, Jun 9, priced at $324 just found
Tue, Oct 13 - Tue, Oct 20
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$326 Roundtrip, found 20 hours ago
$326
Roundtrip
found 20 hours ago
Select Alaska Airlines flight, departing Tue, Oct 13 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Tue, Oct 20, priced at $326 found 20 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.