San Francisco – Bilbao, Spain. $507 (Basic Economy) / $707 (Regular Economy). Roundtrip, including all Taxes – The Flight Deal

Great deals are available for flights to Bilbao. Prices may vary slightly based on your route.

The Matrix Airfare Search by ITA Software lists this fare at $526 (Basic Economy). If you opt for Lufthansa, this fare should reprice to $507 (Basic Economy) or $707 (Regular Economy).

United Airlines and its partners—including Air Canada, Austrian, Lufthansa, and Swiss Air—offer a $707 fare in Regular Economy, which includes one checked bag and a standard carry-on.

There is also a $507 fare available in Basic Economy/Economy Light with United and its partners. Please be aware of the following restrictions for these fares:

• NO advance seat assignments permitted.
• NO checked bags included—$75 for the first bag and $100 for the second, each way.
• NO changes allowed.
• NO cancellations permitted. If you cancel after the 24-hour risk-free period, the Basic Economy fare will lose all value for future purchases.
• Many online travel agencies may not clearly display these fares as BASIC ECONOMY for United, Air Canada, Austrian, Lufthansa, or Swiss Air.

Subscribe to our Real Time Newsletter to get economy class deals for your city about an hour before they make it to our website or social media—all for roughly a nickel a day.

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Bilbao, Spain – Photo: Gabriel González, used under Creative Commons License (By 2.0)

Example Travel Date:

• This is just ONE SAMPLE travel date. For additional options, please refer to “Fare Availability” and “How to Search for Availability” sections below.

Fare Availability:

• Valid for travel from late September to early December or January 2026 to February 2026, with departures on Sundays through Wednesdays and returns on Tuesdays through Fridays. A Sunday stay is required. Availability is limited and tickets must be purchased at least 7 days before departure.

• Note: Although this fare is valid at the time of posting, it may no longer be available if this post is older than two days.

How to Search for Availability:

• These instructions are for searching availability only. To buy your tickets, scroll down to the “How to Buy” section below.

• Use Matrix Airfare Search by ITA Software with the following criteria:
  • Origin: SFO
  • Origin Advanced Routing Code:
    • Routing Codes: LH LH
    • Extension Codes: maxconnect 300
      • This instructs Matrix to search for the Basic Economy fare. If you choose Lufthansa, you will also be given the option to upgrade to Regular Economy.
  • Destination: BIO
  • Return Advanced Routing Code:
    • Routing Codes: LH LH
    • Extension Codes: maxconnect 300
  • (Click the Advanced Codes link to input advanced routing codes)
  • Select “See calendar of lowest fares”
  • Duration “3-10” (This is an example; you can use any 7-day range such as 3-10 or 7-14).
• Refer to the Beginner’s Guide on How to Use Matrix by ITA Software.
• Learn How to Read Airfare Rules and Use Them to Your Advantage.

• The Matrix Airfare Search by ITA Software page should appear as shown below once all values are entered.

• Tickets cannot be purchased using Matrix Airfare Search by ITA Software. For purchasing, please refer to the “How to Buy” section below.

Fare Class:

Routing:

• SFO – MUC (Munich) – BIO (Bilbao) – FRA (Frankfurt) – SFO

Stopover:

Mileage:

Lufthansa is part of the Star Alliance and a partner of United. Mileage earning with United is as follows:

• Miles Flown: 13,043 miles or 3.9 cents per mile (Basic Economy) / 5.4 cents per mile (Regular Economy)
• Redeemable Miles: 3,260 miles

How to Buy:

• Please support us by using our Lufthansa link to book with the dates found on Matrix Airfare Search by ITA Software.
  • For Lufthansa:
    • Light = Basic Economy
    • Basic = Regular Economy

Accommodations:

• TripAdvisor – One of the leading hotel meta-search engines. Discover the lowest hotel prices from over 200 sites.

Car Rentals:

• Rental Cars – A top car rental agency, including all major brands like Hertz, Avis, Budget, Dollar, and Enterprise.

Activities and Tours:

• Viator – The largest marketplace for destination activities and tours worldwide.

Background Information:

• Visa: Not required for US Citizens. Other nationals should check the TIMATIC Visa Database.
• Currency: Euro (EUR). $1 USD = 0.89 EUR.

Tips for Saving with Credit Cards at International Destinations:

For the latest cheap flight deals from San Francisco/Bay Area:

* The Flight Deal earns a commission if you use the Lufthansa, accommodation, car rental, activities, or travel insurance affiliate links to book or apply for a credit card through our link. We appreciate your continued support.

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The Flight Deal does not sell travel products or services. We provide information on third-party travel suppliers’ offers and link you to their sites. The information posted by The Flight Deal is valid at publication but may change or become unavailable. We do not guarantee the accuracy of supplier offers. Please refer to their sites for the most up-to-date details and terms.