San Francisco – Seattle, Washington (and vice versa). $83 (Basic Economy) / $153 (Regular Economy). Roundtrip, including all Taxes – The Flight Deal

Exciting fare alert for travel between San Francisco and Seattle!

Matrix Airfare Search by ITA Software is listing a fare at $153 for Regular Economy. If you use those dates with United, you’ll find options priced at $83 (Basic Economy) and $153 (Regular Economy).

The $153 fare includes advance seat assignment and a standard carry-on bag.

United’s $83 fare is a Basic Economy option, which does not permit advance seat assignments; seating is randomly assigned during check-in. Additionally, a standard-sized carry-on that does not fit under the seat incurs a $35 fee each way + any applicable gate check fees (this fee is waived for holders of a United co-branded credit card or those with United elite status).

What is The Shorthaul? It’s our featured section highlighting deals under $200 and trips less than 3,000 miles roundtrip.

Space Needle, Seattle, Washington – Photo: Tiffany Von Arnim via Flickr, used under Creative Commons License (By 2.0)

Sample Travel Date:

• This is just one sample travel date; for more options, please refer to the “Fare Availability” and “How to Search for Availability” sections below.

Fare Availability:

• Travel is valid from October to early November or December to January 2026 and February 2026 for Tuesday and Wednesday departures and returns. Availability is limited. Tickets must be purchased at least 14 days before departure and by September 12th (TODAY).

• Keep in mind that while this fare is valid at the time of posting, if this post is more than two days old, the fare may no longer be available.

How to Search for Availability:

• This section is for searching availability. To purchase tickets, refer to the “How to Buy” section below.
• Utilize Matrix Airfare Search by ITA Software and input the following search criteria:
  • Origin: SFO
  • Routing Code:
    • Routing Codes: ua
    • Extension Codes:
      • This instructs Matrix Airfare Search to look for the Basic Economy fare. Use these dates on United for the option to upgrade to the Regular Economy fare.
  • Destination: SEA
    • This works both ways; SEA can be the Origin and SFO the Destination as well.
  • Return Routing Code:
    • Routing Codes: ua
    • Extension Codes:
  • (Click on the Advanced Codes link to enable input of advanced routing codes)
  • Select “See calendar of lowest fares”
  • Duration “3-10” (This is merely a sample; any 7-day date range can be used, such as 3-10, 7-14, etc.)
• Check out the Beginner’s Guide on Using Matrix by ITA Software
• Learn how to interpret Airfare Rules to your advantage

• The Matrix Airfare Search page should appear similar to below when all values are inputted.

• You cannot purchase tickets through Matrix Airfare Search by ITA Software. To buy, refer to the “How to Buy” section below.

Fare Class:

• N (Basic Economy)
• G (Regular Economy)

Elite Qualifying Dollars:

Routing:

• SFO – SEA (Seattle) – SFO

Mileage:

• Miles Flown: 1,356 miles
• Redeemable Miles: 569 miles

How to Buy:

• Make your booking on United using the dates found on Matrix Airfare Search by ITA Software.

Accommodations

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Activities and Tours

• Viator – The world’s largest marketplace for destination activities and tours.

For more of the latest cheap flights from San Francisco/Bay Area, check here.

For more of the latest cheap Seattle flights, see here.

* The Flight Deal receives a commission for bookings made through the accommodation, car rental, activities, or travel insurance affiliate links. Thank you for your support.

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The Flight Deal does not sell travel products or services but provides you with information about third-party offers and links to their sites. The information shared is valid at the time of posting, but we cannot guarantee that offers will remain unchanged. Please check the suppliers’ sites for the most current offers and all applicable terms and conditions.