Alaska Airlines Flight 31 Deals & Information (2025/2026)

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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 $236 and $119 for one-way flights to Seattle - Tacoma Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Nov 5 - Sat, Nov 15
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$236 Roundtrip, found 10 hours ago
$236
Roundtrip
found 10 hours ago
Select Alaska Airlines flight, departing Wed, Nov 5 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sat, Nov 15, priced at $236 found 10 hours ago
Tue, Oct 28 - Wed, Nov 5
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$237 Roundtrip, just found
$237
Roundtrip
just found
Select Alaska Airlines flight, departing Tue, Oct 28 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Wed, Nov 5, priced at $237 just found
Fri, Oct 31 - Mon, Nov 3
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$241 Roundtrip, just found
$241
Roundtrip
just found
Select Alaska Airlines flight, departing Fri, Oct 31 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Mon, Nov 3, priced at $241 just found
Sat, Oct 25 - Mon, Oct 27
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$242 Roundtrip, just found
$242
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, Oct 25 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Mon, Oct 27, priced at $242 just found
Tue, Jan 13 - Sat, Jan 17
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$243 Roundtrip, found 4 hours ago
$243
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Tue, Jan 13 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sat, Jan 17, priced at $243 found 4 hours ago
Sat, Dec 6 - Mon, Dec 8
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$246 Roundtrip, just found
$246
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, Dec 6 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Mon, Dec 8, priced at $246 just found
Thu, Dec 11 - Sun, Dec 14
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$247 Roundtrip, found 6 hours ago
$247
Roundtrip
found 6 hours ago
Select Alaska Airlines flight, departing Thu, Dec 11 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sun, Dec 14, priced at $247 found 6 hours ago
Wed, Oct 22 - Tue, Oct 28
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$250 Roundtrip, found 5 hours ago
$250
Roundtrip
found 5 hours ago
Select Alaska Airlines flight, departing Wed, Oct 22 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Tue, Oct 28, priced at $250 found 5 hours ago
Thu, Dec 4 - Thu, Dec 11
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$252 Roundtrip, found 11 hours ago
$252
Roundtrip
found 11 hours ago
Select Alaska Airlines flight, departing Thu, Dec 4 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Thu, Dec 11, priced at $252 found 11 hours ago
Tue, Jan 13 - Sat, Jan 17
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$253 Roundtrip, found 4 hours ago
$253
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Tue, Jan 13 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sat, Jan 17, priced at $253 found 4 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.