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 $294 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, Jun 3 - Sat, Jun 6
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$294 Roundtrip, found 1 hour ago
$294
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Wed, Jun 3 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sat, Jun 6, priced at $294 found 1 hour ago
Wed, Jun 3 - Sat, Jun 6
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$299 Roundtrip, found 1 hour ago
$299
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Wed, Jun 3 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sat, Jun 6, priced at $299 found 1 hour ago
Wed, Jun 3 - Sat, Jun 6
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$304 Roundtrip, found 1 hour ago
$304
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Wed, Jun 3 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sat, Jun 6, priced at $304 found 1 hour ago
Sat, May 30 - Sat, Jun 6
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$304 Roundtrip, just found
$304
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, May 30 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sat, Jun 6, priced at $304 just found
Sat, May 30 - Sat, Jun 6
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$306 Roundtrip, just found
$306
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, May 30 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sat, Jun 6, priced at $306 just found
Sat, Jan 23 - Sat, Jan 30
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$307 Roundtrip, found 4 hours ago
$307
Roundtrip
found 4 hours 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 4 hours ago
Sat, May 30 - Sat, Jun 6
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$313 Roundtrip, just found
$313
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, May 30 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sat, Jun 6, priced at $313 just found
Wed, Jun 3 - Fri, Jun 12
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$314 Roundtrip, just found
$314
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Jun 3 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Fri, Jun 12, priced at $314 just found
Sat, May 30 - Sat, Jun 6
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$316 Roundtrip, just found
$316
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, May 30 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Sat, Jun 6, priced at $316 just found
Wed, Jun 3 - Fri, Jun 12
JFK
John F. Kennedy Intl.
SEA
Seattle - Tacoma Intl.
$320 Roundtrip, just found
$320
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Jun 3 from John F. Kennedy Intl. to Seattle - Tacoma Intl., returning Fri, Jun 12, priced at $320 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.