Alaska Airlines Flight 1 Deals & Information (2026/2027)

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Alaska Airlines Flight 1 Route Deals From $148

The cheapest prices found with in the last 7 days for return flights were $259 and $148 for one-way flights to Seattle - Tacoma Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, May 5 - Fri, May 8
DCA
Ronald Reagan Washington National
SEA
Seattle - Tacoma Intl.
$259 Roundtrip, found 2 days ago
$259
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Tue, May 5 from Ronald Reagan Washington National to Seattle - Tacoma Intl., returning Fri, May 8, priced at $259 found 2 days ago
Tue, May 5 - Fri, May 8
DCA
Ronald Reagan Washington National
SEA
Seattle - Tacoma Intl.
$269 Roundtrip, found 2 days ago
$269
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Tue, May 5 from Ronald Reagan Washington National to Seattle - Tacoma Intl., returning Fri, May 8, priced at $269 found 2 days ago
Mon, Aug 31 - Wed, Sep 9
DCA
Ronald Reagan Washington National
SEA
Seattle - Tacoma Intl.
$270 Roundtrip, found 14 hours ago
$270
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Mon, Aug 31 from Ronald Reagan Washington National to Seattle - Tacoma Intl., returning Wed, Sep 9, priced at $270 found 14 hours ago
Sat, May 2 - Sun, May 10
DCA
Ronald Reagan Washington National
SEA
Seattle - Tacoma Intl.
$300 Roundtrip, found 1 hour ago
$300
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Sat, May 2 from Ronald Reagan Washington National to Seattle - Tacoma Intl., returning Sun, May 10, priced at $300 found 1 hour ago

Frequently asked questions

What route does flight number AS1 take?
AS1 operates from DCA to SEA and is a direct flight. This service generally takes 5 hours and 46 minutes.
How often is AS1 on time?
Alaska Airlines flight number AS1 from DCA to Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) departs according to schedule 86% of the time — so you can rest easy knowing you will arrive at your destination ASAP. If your trip is delayed, the average wait time is 13 minutes. This route has a 4.05-star rating.
What terminal does AS1 fly out of?
You'll likely be stepping aboard the plane at Terminal B if you're booked on flight AS1 direct from Ronald Reagan Washington National Airport (DCA) to Seattle, WA Airport (SEA-Seattle - Tacoma Intl.).
What kind of plane is on flight number AS1?
Get set to cruise aboard an Airbus A321 if you're booked on flight AS1. Nearly all services from National Airport to Seattle - Tacoma Intl. Airport (SEA) are operated using 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 AS1 flight with Travelocity, please visit our Customer Service Portal.