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$334+ Cheap flights from Bilbao (BIO) to San Francisco (SFO)

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 5/14. Fares are subject to change and may not be available on all flights or dates of travel.
BIO — SFO
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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Cheapflights Tip: The best prices from Bilbao to San Francisco are usually found in January or February, booked 59 days in advance, depart on a Wednesday or Tuesday and return on a Sunday

Cheap flight deals from Bilbao to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Bilbao (BIO) to San Francisco (SFO). 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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$435
(Finnair)

One-way from

$334
(Gurufare)

Popular in

July

Cheapest in

January

Average price

$645
Provider with most accurate pricing for Bilbao-San Francisco flight deals.
Search Deals
Provider most trusted by Cheapflights users for Bilbao-San Francisco flights.
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From Bilbao to San Francisco
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One-way flight from Bilbao to San Francisco
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($171 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find flight deals from Bilbao to San Francisco

Cheapest flights from Bilbao to San Francisco
Explore the most affordable flight options available from Bilbao to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

This Finnair deal was found by Cheapflights users on 3/27. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/126:45 amBIO - SFO
2 stops26h 21mFinnair
Tue 5/275:45 pmSFO - BIO
1 stop20h 30mFinnair
Deal found 3/27$435
This Finnair deal was found by Cheapflights users on 3/27. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/129:35 pmBIO - SFO
1 stop27h 35mMultiple Airlines
Tue 5/275:45 pmSFO - BIO
1 stop20h 30mMultiple Airlines
Deal found 3/27$439
This Iberia deal was found by Cheapflights users on 3/27. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/159:15 amBIO - SFO
2 stops20h 45mIberia
Thu 5/295:45 pmSFO - BIO
1 stop14h 10mIberia
Deal found 3/27$446
This American Airlines deal was found by Cheapflights users on 3/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/159:15 amBIO - SFO
1 stop15h 55mAmerican Airlines
Thu 5/295:45 pmSFO - BIO
1 stop29h 45mAmerican Airlines
Deal found 3/27$448
This Delta deal was found by Cheapflights users on 3/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/156:50 amBIO - SFO
2 stops19h 58mDelta
Thu 5/291:45 pmSFO - BIO
2 stops17h 55mDelta
Deal found 3/27$580
This United Airlines deal was found by Cheapflights users on 3/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/32:10 pmBIO - SFO
2 stops18h 59mUnited Airlines
Sun 10/129:05 pmSFO - BIO
1 stop17h 20mUnited Airlines
Deal found 3/26$594
This TAP AIR PORTUGAL deal was found by Cheapflights users on 3/26. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/247:45 pmBIO - SFO
1 stop27h 45mTAP AIR PORTUGAL
Tue 9/96:45 pmSFO - BIO
2 stops31h 45mTAP AIR PORTUGAL
Deal found 3/26$663
This Mytrip deal was found by Cheapflights users on 3/26. 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.
Fri 10/36:45 amBIO - SFO
1 stop22h 10mLufthansa
Sun 10/129:05 pmSFO - BIO
1 stop17h 20mLufthansa
Deal found 3/26$686
This lol.travel deal was found by Cheapflights users on 3/26. 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.
Sat 6/76:10 pmBIO - SFO
1 stop30h 45mAer Lingus
Sat 6/145:45 pmSFO - BIO
1 stop14h 45mAer Lingus
Deal found 3/26$741
This Gotogate deal was found by Cheapflights users on 3/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/112:50 pmBIO - SFO
1 stop34h 40mScandinavian Airlines
Thu 8/287:40 pmSFO - BIO
1 stop15h 10mScandinavian Airlines
Deal found 3/26$747
This SWISS deal was found by Cheapflights users on 3/27. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/27:05 pmBIO - SFO
1 stop30h 05mSWISS
Mon 6/167:40 pmSFO - BIO
2 stops51h 00mSWISS
Deal found 3/27$809
This Turkish Airlines deal was found by Cheapflights users on 3/27. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1812:05 pmBIO - SFO
1 stop37h 35mTurkish Airlines
Sat 11/17:50 pmSFO - BIO
1 stop31h 20mTurkish Airlines
Deal found 3/27$849

Cheapflights Fare Finder

Customize your flight search to find flights from Bilbao to San Francisco 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 March 28, 2025.
Use the filters below to find and compare flights from Bilbao to San Francisco that are best for you.

Fly from

Bilbao

Fly to

San Francisco

Route

Depart

Return

Price

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

Mon 5/12

6:45 am-12:06 am

2 stops26h 21m

San Francisco

Tue 5/27

5:45 pm-11:15 pm

1 stop20h 30m

$435

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

Mon 5/12

9:35 pm-4:10 pm

1 stop27h 35m

San Francisco

Tue 5/27

5:45 pm-11:15 pm

1 stop20h 30m

$439

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

Thu 5/15

9:15 am-9:00 pm

2 stops20h 45m

San Francisco

Thu 5/29

5:45 pm-4:55 pm

1 stop14h 10m

$446

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

Thu 5/15

9:15 am-4:10 pm

1 stop15h 55m

San Francisco

Thu 5/29

5:45 pm-8:30 am

1 stop29h 45m

$448

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

Thu 5/15

6:50 am-5:48 pm

2 stops19h 58m

San Francisco

Thu 5/29

1:45 pm-4:40 pm

2 stops17h 55m

$580

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

Sun 8/24

7:45 pm-2:30 pm

1 stop27h 45m

San Francisco

Tue 9/9

6:45 pm-11:30 am

2 stops31h 45m

$663

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

Sat 6/7

6:10 pm-3:55 pm

1 stop30h 45m

San Francisco

Sat 6/14

5:45 pm-5:30 pm

1 stop14h 45m

$741

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

Sun 4/20

6:45 am-8:19 pm

2 stops22h 34m

San Francisco

Sat 5/3

11:00 pm-11:25 pm

2 stops39h 25m

$745

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

Mon 8/11

2:50 pm-4:30 pm

1 stop34h 40m

San Francisco

Thu 8/28

7:40 pm-7:50 pm

1 stop15h 10m

$747

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

Sat 4/19

7:15 pm-4:05 pm

1 stop29h 50m

San Francisco

Fri 5/2

1:10 pm-6:25 pm

1 stop20h 15m

$803

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 20 results
1
2

Compare providers for flights from Bilbao to San Francisco

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Bilbao to San Francisco in March.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Bilbao-San Francisco flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Bilbao-San Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Bilbao-San Francisco flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Bilbao-San Francisco flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Bilbao-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Bilbao to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Bilbao 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 Bilbao to San Francisco

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

Use this chart to determine the optimal time to book a round-trip flight from Bilbao to San Francisco. Price data was last updated on March 21, 2025.

The price you pay for your flight from Bilbao to San Francisco may vary depending on when you book. For the best chance of a lower fare, look to book 59 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Bilbao to San Francisco (average of $276). Flying from Bilbao to San Francisco in June is currently the most expensive (average of $398). 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 BIO to SFO?

Find hourly flight availability from Bilbao to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 28, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 14% on flights from Bilbao to San Francisco by exploring options for tickets in the afternoon.

Rainfall in San Francisco by month

Plan your trip to San Francisco by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

Temperature in San Francisco by month

Plan your trip to San Francisco by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. 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 San Francisco. Reviews last updated March 28, 2025.
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,897 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
SWISS
7.5
Good
1,570 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,603 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Turkish Airlines
7.3
Good
3,744 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

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

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

    Finnair, at $435, was found to be the cheapest airline from Bilbao to San Francisco.Alternate airlines to your destination round-trip include Iberia and American Airlines. Finnair is 32% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Bilbao to San Francisco one-way?

    To fly one-way, consider booking your trip with TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at $334. Finnair flights start at $509 while deals on Turkish Airlines start at $613 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Bilbao to San Francisco 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 Bilbao to San Francisco?

    Currently, January is the cheapest month in which you can book a flight from Bilbao to San Francisco (average of $276). Flying from Bilbao to San Francisco in June is currently the most expensive (average of $398). 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

Traveling to a place near Bilbao?

Book flights to Bilbao if you plan to visit one of these locations
Roseville
Mountain View
Santa Cruz
Turlock
Fairfield
South San Francisco
Manteca
Sausalito
Richmond
Watsonville
Hollister
Milpitas
Antioch
Hayward
Vallejo
Newark
Alameda
Campbell
Daly City
Pacific Grove

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Bilbao to San Francisco

Discover the top 3 airlines that operate flights from Bilbao to San Francisco. 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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$397Average$949FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$467Average$926FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$538Average$814FlexibilityNo cancel feeOn-time69%
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