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$368+ 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 7/15. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BIO
May 4 — May 111
Sun 5/4
Sun 5/11
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 31 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 April 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$685
(Air Canada)

One-way from

$368
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$989
Provider with most accurate pricing for San Francisco-Bilbao flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Francisco-Bilbao flights.
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From San Francisco to Bilbao
Search Deals
One-way flight from San Francisco to Bilbao
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($176 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 29, 2025.

This oojo deal was found by Cheapflights users on 4/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/14:20 pmSFO - BIO
1 stop34h 10mTAP AIR PORTUGAL
Wed 10/1512:25 pmBIO - SFO
1 stop35h 05mTAP AIR PORTUGAL
Deal found 4/28$525
This Iberia deal was found by Cheapflights users on 4/28. 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 10/97:25 pmSFO - BIO
1 stop18h 00mIberia
Tue 10/1410:45 amBIO - SFO
1 stop16h 25mIberia
Deal found 4/28$535
This FlightHub deal was found by Cheapflights users on 4/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/98:35 pmSFO - BIO
1 stop16h 15mMultiple Airlines
Thu 11/276:45 amBIO - SFO
2 stops19h 59mMultiple Airlines
Deal found 4/28$584
This Air Canada deal was found by Cheapflights users on 4/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/157:10 amSFO - BIO
2 stops25h 40mAir Canada
Fri 10/246:45 amBIO - SFO
2 stops25h 24mAir Canada
Deal found 4/28$585
This SWISS deal was found by Cheapflights users on 4/28. 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.
Wed 9/177:30 pmSFO - BIO
1 stop33h 05mSWISS
Thu 10/28:25 amBIO - SFO
2 stops40h 03mSWISS
Deal found 4/28$590
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Mon 9/2210:45 pmSFO - BIO
2 stops27h 00mUnited Airlines
Wed 10/16:45 amBIO - SFO
1 stop14h 55mUnited Airlines
Deal found 4/28$591
This Delta deal was found by Cheapflights users on 4/28. 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.
Tue 10/143:05 pmSFO - BIO
1 stop16h 35mDelta
Wed 10/296:50 amBIO - SFO
1 stop14h 00mDelta
Deal found 4/28$594
This Lufthansa deal was found by Cheapflights users on 4/28. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/139:05 pmSFO - BIO
1 stop17h 20mLufthansa
Tue 10/2811:35 amBIO - SFO
1 stop16h 10mLufthansa
Deal found 4/28$596
This KLM deal was found by Cheapflights users on 4/28. 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.
Wed 10/13:05 pmSFO - BIO
1 stop21h 55mKLM
Fri 10/177:10 amBIO - SFO
2 stops17h 50mKLM
Deal found 4/28$610
This Brussels Airlines deal was found by Cheapflights users on 4/28. 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 Brussels Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/222:40 pmSFO - BIO
2 stops16h 25mBrussels Airlines
Tue 9/304:55 pmBIO - SFO
2 stops28h 45mBrussels Airlines
Deal found 4/28$675

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 April 29, 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

Tue 5/13

7:10 am-5:50 pm

2 stops25h 40m

Bilbao

Wed 5/21

6:45 am-11:11 pm

2 stops25h 26m

$685

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Mon 5/12

7:40 pm-7:55 am

2 stops51h 15m

Bilbao

Fri 5/23

8:55 am-4:10 pm

1 stop16h 15m

$690

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Tue 5/13

3:05 pm-10:00 pm

1 stop21h 55m

Bilbao

Wed 5/21

5:15 pm-11:45 am

1 stop27h 30m

$694

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Mon 5/12

9:05 pm-11:25 pm

1 stop17h 20m

Bilbao

Thu 5/22

7:15 am-7:00 pm

1 stop20h 45m

$696

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Tue 5/13

10:00 am-4:40 pm

2 stops21h 40m

Bilbao

Wed 5/21

6:50 am-11:45 am

1 stop13h 55m

$699

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Mon 5/12

10:35 am-11:25 pm

2 stops27h 50m

Bilbao

Thu 5/22

7:15 am-7:00 pm

1 stop20h 45m

$701

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Tue 5/13

8:00 pm-8:15 am

1 stop27h 15m

Bilbao

Wed 5/28

7:55 am-11:16 pm

2 stops24h 21m

$775

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Sat 5/17

8:00 pm-8:15 am

1 stop27h 15m

Bilbao

Sat 5/24

7:55 pm-6:00 pm

1 stop31h 05m

$807

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Tue 5/13

8:00 pm-8:15 am

1 stop27h 15m

Bilbao

Sun 5/25

8:55 am-6:00 pm

1 stop18h 05m

$808

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Sat 5/10

12:40 pm-11:05 am

1 stop37h 25m

Bilbao

Tue 5/27

12:05 pm-10:35 am

1 stop31h 30m

$870

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 24 results
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Compare providers for flights from San Francisco to Bilbao

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 San Francisco to Bilbao in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice 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 San Francisco-Bilbao flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on San Francisco-Bilbao flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from San Francisco-Bilbao flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Francisco-Bilbao flights, Cheapflights users trust AranGrant the most. AranGrant 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 San Francisco-Bilbao 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 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 April 25, 2025.

The best time to book flights from San Francisco to Bilbao is 31 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 $1,178). 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 April 29, 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.

Rainfall in Bilbao by month

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

In terms of precipitation, rainfall in Bilbao ranges from 2.4 - 5.6 inches per month. November is typically the wettest month, when rainfall can reach 5.6 in. July is typically the driest time to visit Bilbao when rainfall is around 2.4 in.

Temperature in Bilbao by month

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

If weather is an important factor for your trip to Bilbao, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

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 April 29, 2025.
Read reviews from past customers who have flown Delta, KLM and SWISS from San Francisco to Bilbao. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,929 reviews

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

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
7,929 reviews
Delta
8.0
Very good
7,929 reviews

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

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
1,333 reviews
Delta
8.0
Very good
7,929 reviews

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

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.
SWISS
7.5
Good
1,587 reviews
Delta
8.0
Very good
7,929 reviews

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

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
8,696 reviews
Delta
8.0
Very good
7,929 reviews

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

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.
Turkish Airlines
7.3
Good
3,785 reviews
Delta
8.0
Very good
7,929 reviews

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

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.

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

    Currently priced at $685, Air Canada will fly you from San Francisco to Bilbao and back. In addition to Air Canada, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from SWISS and KLM - these airlines can fly you to your destination from $690 and $694, respectively. Air Canada is 27% cheaper than the average price of flights available within the next 90 days to this destination.

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

    For one-way options, check prices for Vueling. According to our data, you can fly for as low as $417. Users have also found prices from $427 and $442 on Iberia and TAP AIR PORTUGAL, respectively.

  • 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 $1,178). 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 7 airlines flying from San Francisco to Bilbao

Discover the top 7 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
LEVELCheapest$501Average$1,062FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$557Average$1,007FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$599Average$1,275FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$600Average$992FlexibilityNo cancel feeOn-time69%
KLMCheapest$620Average$879FlexibilityNo cancel feeOn-time75%
DeltaCheapest$640Average$973FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$703Average$1,109FlexibilityNo cancel feeOn-time77%

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