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$236+ Cheap flights from San Francisco (SFO) to Bilbao (BIO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/19. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BIO
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from San Francisco to Bilbao are usually found in September or March, booked 87 days in advance, depart on a Sunday or Tuesday and return on a Wednesday

Cheap flight deals from San Francisco to Bilbao

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Bilbao (BIO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$424
(Mytrip)

One-way from

$319
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$672
From San Francisco to Bilbao
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One-way flight from San Francisco to Bilbao
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Highest demand for flights based on searches. 3% potential increase in price ($34 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from San Francisco to Bilbao

Cheapest flights from San Francisco to Bilbao
Explore the most affordable flight options available from San Francisco to Bilbao. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/199:40 pmSFO - BIO
1 stop16h 25mLufthansa
Thu 11/2711:35 amBIO - SFO
1 stop17h 00mLufthansa
Deal found 9/9$419
This Mytrip deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/157:30 pmSFO - BIO
1 stop15h 40mMultiple Airlines
Wed 10/2211:50 amBIO - SFO
2 stops32h 21mMultiple Airlines
Deal found 9/10$424
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/159:05 pmSFO - BIO
1 stop17h 20mLufthansa
Wed 10/2211:50 amBIO - SFO
1 stop16h 10mLufthansa
Deal found 9/10$425
This lol.travel deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/139:05 pmSFO - BIO
1 stop17h 20mUnited Airlines
Wed 10/297:25 amBIO - SFO
1 stop21h 10mUnited Airlines
Deal found 9/9$427
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/149:05 pmSFO - BIO
1 stop17h 20mLufthansa
Tue 10/216:45 amBIO - SFO
1 stop14h 55mLufthansa
Deal found 9/8$433
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/147:30 pmSFO - BIO
2 stops37h 20mSWISS
Tue 10/219:00 pmBIO - SFO
1 stop28h 10mSWISS
Deal found 9/9$435
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/67:40 pmSFO - BIO
1 stop15h 35mSWISS
Thu 10/169:00 pmBIO - SFO
1 stop28h 10mSWISS
Deal found 9/9$442

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Francisco to Bilbao that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from San Francisco to Bilbao that are best for you.

Fly from

San Francisco

Fly to

Bilbao

Route

Depart

Return

Price

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Wed 10/15

7:30 pm-8:10 pm

1 stop15h 40m

Bilbao

Wed 10/22

11:50 am-11:11 am

2 stops32h 21m

$424

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Wed 10/15

9:05 pm-11:25 pm

1 stop17h 20m

Bilbao

Wed 10/22

11:50 am-7:00 pm

1 stop16h 10m

$425

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Tue 10/14

7:30 pm-5:50 pm

2 stops37h 20m

Bilbao

Tue 10/21

9:00 pm-4:10 pm

1 stop28h 10m

$437

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Sun 9/21

3:05 pm-4:40 pm

1 stop16h 35m

Bilbao

Tue 10/7

7:10 am-12:50 pm

1 stop14h 40m

$457

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Wed 10/1

8:25 pm-10:00 pm

1 stop16h 35m

Bilbao

Tue 10/7

7:10 am-12:50 pm

1 stop14h 40m

$457

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Tue 10/14

4:20 pm-11:30 am

1 stop34h 10m

Bilbao

Tue 10/21

6:50 pm-2:35 pm

1 stop28h 45m

$458

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Tue 11/18

3:40 pm-5:20 pm

1 stop16h 40m

Bilbao

Tue 11/25

6:50 am-11:50 am

1 stop14h 00m

$458

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Mon 9/22

9:05 pm-11:25 pm

1 stop17h 20m

Bilbao

Wed 10/8

6:45 am-12:40 pm

1 stop14h 55m

$461

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Tue 10/14

2:00 pm-11:25 pm

1 stop24h 25m

Bilbao

Tue 10/21

6:45 am-12:40 pm

1 stop14h 55m

$461

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Sun 10/19

8:10 pm-5:35 pm

1 stop36h 25m

$236

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 17 results
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Best time to book a flight from San Francisco to Bilbao

Have a flexible travel schedule? Discover the best time to fly to Bilbao from San Francisco with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Francisco to Bilbao

How far ahead should I book a flight from San Francisco to Bilbao?

Use this chart to determine the optimal time to book a round-trip flight from San Francisco to Bilbao. Price data was last updated on August 29, 2025.

The best time to book flights from San Francisco to Bilbao is 86 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from San Francisco to Bilbao?

Currently, January is the cheapest month in which you can book a flight from San Francisco to Bilbao (average of $541). Flying from San Francisco to Bilbao in June is currently the most expensive (average of $1,136). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SFO to BIO?

Find hourly flight availability from San Francisco to Bilbao. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

It’s optimal to fly from San Francisco to Bilbao in the evening. By choosing this option you can save up to 22% on the cost of your flight, compared to a flight at noon.

What is the cheapest day to fly from San Francisco to Bilbao?

Use this chart to determine the cheapest time to fly round-trip from San Francisco to Bilbao. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their San Francisco to Bilbao flight should consider departing on Sunday afternoons when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Bilbao

Get insights into the airlines that provide service to Bilbao. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Bilbao. Reviews last updated September 11, 2025.
Read reviews from past customers who have flown Delta, KLM, and United Airlines from San Francisco to Bilbao. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,385 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Iberia
7.0
Good
2,929 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Lufthansa
6.8
Okay
7,409 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Overall

8.0

Entertainment

7.9

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Bilbao. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from San Francisco to Bilbao?

    There are many flights that can get you from San Francisco to Bilbao in 17h 20m. Fly via Lufthansa or SWISS to get the fastest option. The distance from San Francisco to Bilbao is about 5678 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from San Francisco to Bilbao round-trip?

    Currently priced at $427, LEVEL will fly you from San Francisco to Bilbao and back. In addition to LEVEL, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Lufthansa and Iberia - these airlines can fly you to your destination from $557 and $589, respectively. LEVEL is 51% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from San Francisco to Bilbao that include hotel bookings?

    Yes. In addition to deals on San Francisco to Bilbao flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Francisco to Bilbao?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Bilbao.

  • Can I find deals for business class flights from San Francisco to Bilbao?

    Yes. Cheapflights offers flight deals from San Francisco to Bilbao by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Francisco to Bilbao?

    Currently, January is the cheapest month in which you can book a flight from San Francisco to Bilbao (average of $541). Flying from San Francisco to Bilbao in June is currently the most expensive (average of $1,136). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from San Francisco to Bilbao

Discover the top 6 airlines that operate flights from San Francisco to Bilbao. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
LEVELCheapest$427Average$788FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$557Average$934FlexibilityNo cancel feeOn-time76%
IberiaCheapest$589Average$1,053FlexibilityNo cancel feeOn-time77%
KLMCheapest$612Average$779FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$627Average$974FlexibilityNo cancel feeOn-time69%
DeltaCheapest$649Average$901FlexibilityNo cancel feeOn-timeN/A

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