Cheap Flights from Bilbao to San Francisco from $374

Frequently Asked Questions

• What are the cheapest flights from Bilbao to San Francisco (BIO-SFO)?

  Based on Trip.com data, TAP Air Portugal offers one-way fares as low as $374 on Cheapest nonstop routes (e.g. BIO to SFO on Wed, Nov 11), while Swiss Airlines offers Cheapest nonstop round-trips from $561 departing on Fri, Dec 4 and returning on Wed, Dec 9.

• Which airlines offer flights from Bilbao to San Francisco?

  At the moment, several airlines serve connecting flights from Bilbao to San Francisco, including: Iberia Selected airlines are based on historical data collected from flight bookings made by users on Trip.com within the last 90 days.

• When is the best time to book flights from Bilbao to San Francisco?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Bilbao to San Francisco is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How can I find the best deals on flights from Bilbao to San Francisco?

  To find best deals on flights from Bilbao to San Francisco, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Wed, Nov 11, with one-way flights priced at just $374.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is TAP Air Portugal.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for San Francisco travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Bilbao (BIO) to San Francisco (SFO) the cheapest?

  The cheapest months to fly from Bilbao to San Francisco is November, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Bilbao to San Francisco on?

  After crunching the numbers on our October flight calendar, it's currently cheapest to fly from Bilbao to San Francisco on October 20, 2026 with TAP Air Portugal, with prices starting at $443.

• Which airports can I fly into San Francisco from Bilbao?

  You can arrive at any of the following airports in San Francisco: San Francisco International Airport (SFO). Flights from Bilbao Airport to San Francisco International Airport (BIO-SFO) are by far the most popular option for this route.

• Is there any time difference between Bilbao and San Francisco?

  The time difference between San Francisco and Bilbao is 9h.

• How do I change or cancel my ticket from Bilbao to San Francisco?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

• What is the average cost of a one-way flight from Bilbao to San Francisco?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Bilbao to San Francisco is $1,122. Fares vary by travel date, airline and availability.

• How do I book flights from Bilbao to San Francisco on Trip.com?

  Enter Bilbao and San Francisco, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.