HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Francisco

$402+ 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 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
BIO — SFO
Dec 12 — Dec 191
Fri 12/12
Fri 12/19
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 62 days in advance, depart on a Wednesday or Tuesday and return on a Sunday

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 November 12, 2025.

This Iberia deal was found by Cheapflights users on 11/12. 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.
Wed 12/109:15 amBIO - SFO
2 stops20h 15mIberia
Tue 1/137:00 amSFO - BIO
2 stops16h 30mIberia
Deal found 11/12$508
This lol.travel deal was found by Cheapflights users on 11/12. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/166:40 pmBIO - SFO
1 stop28h 55mTAP AIR PORTUGAL
Mon 12/14:35 pmSFO - BIO
1 stop16h 20mTAP AIR PORTUGAL
Deal found 11/12$526
This Expedia deal was found by Cheapflights users on 11/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/49:35 pmBIO - SFO
2 stops31h 55mIberia
Tue 12/97:00 amSFO - BIO
2 stops16h 30mIberia
Deal found 11/10$565
This Orbitz deal was found by Cheapflights users on 11/12. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1012:50 pmBIO - SFO
1 stop16h 20mLufthansa
Tue 1/139:40 pmSFO - BIO
1 stop15h 15mLufthansa
Deal found 11/12$579
This United Airlines deal was found by Cheapflights users on 11/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1012:50 pmBIO - SFO
1 stop16h 20mUnited Airlines
Mon 1/1212:43 amSFO - BIO
3 stops25h 07mUnited Airlines
Deal found 11/12$580
This United Airlines deal was found by Cheapflights users on 11/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:45 amBIO - SFO
2 stops34h 05mUnited Airlines
Tue 12/99:40 pmSFO - BIO
1 stop15h 15mUnited Airlines
Deal found 11/10$613
This Gotogate deal was found by Cheapflights users on 11/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:45 amBIO - SFO
1 stop14h 55mLufthansa
Tue 12/99:40 pmSFO - BIO
1 stop15h 15mLufthansa
Deal found 11/10$625
This Delta deal was found by Cheapflights users on 11/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:25 amBIO - SFO
1 stop15h 00mDelta
Mon 11/245:50 amSFO - BIO
2 stops20h 40mDelta
Deal found 11/10$687
This Delta deal was found by Cheapflights users on 11/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1712:15 pmBIO - SFO
2 stops20h 58mDelta
Fri 11/288:15 amSFO - BIO
2 stops23h 15mDelta
Deal found 11/10$698
This KLM deal was found by Cheapflights users on 11/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:25 amBIO - SFO
1 stop15h 00mKLM
Mon 11/241:55 pmSFO - BIO
1 stop17h 35mKLM
Deal found 11/10$710

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 November 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$479
(Expedia)

One-way from

$402
(Mytrip)

Popular in

July

Cheapest in

January

Average price

$611
Provider with most accurate pricing for Bilbao-San Francisco flight deals.
Search Deals
Provider most trusted by Cheapflights users for Bilbao-San Francisco flights.
Search Deals
From Bilbao to San Francisco
Search Deals
One-way flight from Bilbao to San Francisco
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($173 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 12, 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 1/12

6:45 am-9:37 pm

2 stops23h 52m

San Francisco

Mon 1/19

10:35 am-11:15 pm

2 stops27h 40m

$496

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

Wed 3/4

9:15 am-8:42 pm

2 stops20h 27m

San Francisco

Sun 3/8

10:24 am-12:50 pm

2 stops18h 26m

$497

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

Fri 2/13

6:45 am-8:54 pm

2 stops23h 09m

San Francisco

Sun 2/22

10:06 am-12:50 pm

2 stops17h 44m

$514

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

Thu 3/5

12:50 pm-8:10 pm

1 stop16h 20m

San Francisco

Mon 3/9

2:30 pm-11:05 pm

1 stop24h 35m

$550

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

Wed 3/4

12:50 pm-8:10 pm

1 stop16h 20m

San Francisco

Sun 3/8

11:20 pm-10:50 am

2 stops27h 30m

$551

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

Mon 2/9

6:45 am-8:10 pm

1 stop22h 25m

San Francisco

Mon 2/23

9:25 pm-11:05 pm

1 stop16h 40m

$551

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

Sun 12/7

2:40 pm-2:35 pm

2 stops32h 55m

$402

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

Wed 12/24

10:20 pm-4:05 pm

2 stops50h 45m

$450

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

Sun 12/7

3:55 pm-3:35 pm

1 stop32h 40m

$487

BilbaoSan Francisco

BIO - SFO

BIOSFO

Bilbao

Wed 12/24

12:50 pm-8:10 pm

1 stop16h 20m

$616

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/10

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 November.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
OvagoPrice Accuracy2 starsTrust Score*2 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Bilbao-San Francisco flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 November 7, 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, September is the cheapest month in which you can book a flight from Bilbao to San Francisco (average of $332). Flying from Bilbao to San Francisco in December is currently the most expensive (average of $680). 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 November 12, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 30% on flights from Bilbao to San Francisco by exploring options for tickets in the evening.

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 November 12, 2025.
Read reviews from past customers who have flown United Airlines 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.
United Airlines
7.4
Good
9,015 reviews

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
9,015 reviews
United Airlines
7.4
Good
9,015 reviews

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

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.

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

    A quick flight from Bilbao to San Francisco can take about 20h 27m. Iberia provides one of the quickest options available for as low as $497. Airlines will cover a distance of 5678 mi.

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

    United Airlines, at $538, was found to be the cheapest airline from Bilbao to San Francisco.. United Airlines is 16% 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, September is the cheapest month in which you can book a flight from Bilbao to San Francisco (average of $332). Flying from Bilbao to San Francisco in December is currently the most expensive (average of $680). 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
South San Francisco
Santa Cruz
Livermore
Turlock
Manteca
Watsonville
Sunnyvale
Santa Clara
Vallejo
Hollister
San Bruno
Foster City
Redwood City
Union City
Burlingame
Lodi
San Mateo
Vacaville
Lathrop

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 airline flying from Bilbao to San Francisco

Discover the top airline 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 November 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$538Average$734FlexibilityNo cancel feeOn-time69%

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.