HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Francisco

$338+ 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
BIO — SFO
août 18 — août 251
lun. 8/18
lun. 8/25
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Bilbao to San Francisco with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Bilbao to San Francisco are usually found in January or February, booked 61 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 août 13, 2025.

Round-trip from

$535
(Iberia)

One-way from

$338
(lol.travel)

Popular in

July

Cheapest in

January

Average price

$786
From Bilbao to San Francisco
Search Deals
One-way flight from Bilbao to San Francisco
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($182 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

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 août 13, 2025.

This Iberia deal was found by Cheapflights users on 8/11. 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.
jeu. 9/116:45 amBIO - SFO
1 stop18h 25mIberia
mer. 9/246:20 pmSFO - BIO
1 stop19h 55mIberia
Deal found 8/11$535
This Iberia deal was found by Cheapflights users on 8/11. 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.
lun. 9/221:30 pmBIO - SFO
2 stops18h 39mIberia
mar. 10/78:10 pmSFO - BIO
2 stops18h 05mIberia
Deal found 8/11$554
This Iberia deal was found by Cheapflights users on 8/12. 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.
mar. 10/141:30 pmBIO - SFO
2 stops18h 58mIberia
dim. 10/192:10 pmSFO - BIO
2 stops17h 45mIberia
Deal found 8/12$557
This Finnair deal was found by Cheapflights users on 8/12. 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.
jeu. 10/166:45 amBIO - SFO
2 stops22h 42mMultiple Airlines
lun. 10/202:01 pmSFO - BIO
2 stops24h 14mMultiple Airlines
Deal found 8/12$562
This American Airlines deal was found by Cheapflights users on 8/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/221:30 pmBIO - SFO
2 stops19h 29mAmerican Airlines
mar. 10/710:55 amSFO - BIO
2 stops16h 50mAmerican Airlines
Deal found 8/10$563
This Finnair deal was found by Cheapflights users on 8/11. 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.
jeu. 9/116:45 amBIO - SFO
2 stops26h 14mMultiple Airlines
mer. 9/242:17 pmSFO - BIO
2 stops23h 58mMultiple Airlines
Deal found 8/11$564
This lol.travel deal was found by Cheapflights users on 8/10. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 11/2712:10 pmBIO - SFO
1 stop36h 55mTAP AIR PORTUGAL
lun. 12/14:35 pmSFO - BIO
1 stop16h 20mTAP AIR PORTUGAL
Deal found 8/10$567
This American Airlines deal was found by Cheapflights users on 8/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/149:15 amBIO - SFO
2 stops20h 12mAmerican Airlines
dim. 10/192:10 pmSFO - BIO
2 stops17h 45mAmerican Airlines
Deal found 8/10$580
This lol.travel deal was found by Cheapflights users on 8/10. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 11/276:30 amBIO - SFO
1 stop15h 10mUnited Airlines
lun. 12/16:00 amSFO - BIO
2 stops25h 40mUnited Airlines
Deal found 8/10$584

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 août 13, 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

jeu. 9/11

6:45 am-4:10 pm

1 stop18h 25m

San Francisco

mer. 9/24

6:20 pm-11:15 pm

1 stop19h 55m

$535

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

lun. 9/22

1:30 pm-11:09 pm

2 stops18h 39m

San Francisco

mar. 10/7

8:10 pm-11:15 pm

2 stops18h 05m

$554

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

mar. 10/14

1:30 pm-11:28 pm

2 stops18h 58m

San Francisco

dim. 10/19

2:10 pm-4:55 pm

2 stops17h 45m

$557

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

jeu. 10/16

6:45 am-8:27 pm

2 stops22h 42m

San Francisco

lun. 10/20

2:01 pm-11:15 pm

2 stops24h 14m

$562

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

lun. 9/22

1:30 pm-11:59 pm

2 stops19h 29m

San Francisco

mar. 10/7

10:55 am-12:45 pm

2 stops16h 50m

$563

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

jeu. 10/16

9:15 am-8:27 pm

2 stops20h 12m

San Francisco

lun. 10/20

8:08 am-12:45 pm

2 stops19h 37m

$563

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

jeu. 9/11

6:45 am-11:59 pm

2 stops26h 14m

San Francisco

mer. 9/24

2:17 pm-11:15 pm

2 stops23h 58m

$564

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

jeu. 11/27

12:10 pm-4:05 pm

1 stop36h 55m

San Francisco

lun. 12/1

4:35 pm-5:55 pm

1 stop16h 20m

$567

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

mar. 9/2

6:50 pm-2:35 pm

1 stop28h 45m

$338

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

mer. 9/3

8:45 am-4:34 pm

2 stops40h 49m

$343

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/11

Showing 1-10 of 16 results
1
2

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 August 8, 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 $358). 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 août 13, 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.

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 août 13, 2025.
Read reviews from past customers who have flown KLM, United Airlines, and Lufthansa from Bilbao to San Francisco. 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.
KLM
7.8
Good
1,381 reviews

Boarding

7.8

Food

7.3

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,381 reviews
KLM
7.8
Good
1,381 reviews

Boarding

7.8

Food

7.3

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
United Airlines
7.4
Good
8,920 reviews
KLM
7.8
Good
1,381 reviews

Boarding

7.8

Food

7.3

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Lufthansa
6.8
Okay
7,317 reviews
KLM
7.8
Good
1,381 reviews

Boarding

7.8

Food

7.3

Crew

8.4

Entertainment

7.1

Comfort

7.7

Overall

7.8

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

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 is the cheapest airline to fly from Bilbao to San Francisco round-trip?

    Iberia, at $535, was found to be the cheapest airline from Bilbao to San Francisco.. Iberia is 15% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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 $358). 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 San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Roseville
Santa Cruz
Livermore
South San Francisco
Mountain View
Turlock
Santa Clara
Hollister
Antioch
Watsonville
Manteca
Sunnyvale
Newark
Milpitas
Campbell
Foster City
San Leandro
Burlingame
Redwood City
Vallejo

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 août 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$397Average$1,011FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$538Average$734FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$596Average$774FlexibilityNo cancel feeOn-time76%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.