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$280+ 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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BIO
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$565
(Mytrip)

One-way from

$280
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$1,206
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. 13% potential increase in price ($135 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Mytrip deal was found by Cheapflights users on 6/10. 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.
Mon 10/208:30 amSFO - BIO
2 stops22h 35mMultiple Airlines
Mon 10/276:50 pmBIO - SFO
2 stops32h 44mMultiple Airlines
Deal found 6/10$531
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Tue 8/1911:35 amSFO - BIO
1 stop14h 10mUnited Airlines
Wed 8/276:45 amBIO - SFO
1 stop22h 05mUnited Airlines
Deal found 6/10$573
This FlightHub deal was found by Cheapflights users on 6/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/199:05 pmSFO - BIO
1 stop17h 20mLufthansa
Wed 8/276:45 amBIO - SFO
1 stop14h 55mLufthansa
Deal found 6/9$590
This Delta deal was found by Cheapflights users on 6/10. 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 8/411:59 pmSFO - BIO
2 stops26h 01mDelta
Tue 8/1912:00 pmBIO - SFO
1 stop32h 45mDelta
Deal found 6/10$626
This Iberia deal was found by Cheapflights users on 6/10. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/215:45 pmSFO - BIO
1 stop29h 45mIberia
Mon 9/15:35 pmBIO - SFO
2 stops35h 58mIberia
Deal found 6/10$724
This Air Canada deal was found by Cheapflights users on 6/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/218:40 amSFO - BIO
2 stops18h 25mAir Canada
Sat 11/2912:50 pmBIO - SFO
2 stops31h 12mAir Canada
Deal found 6/9$766
This SWISS deal was found by Cheapflights users on 6/10. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/3012:55 pmSFO - BIO
2 stops22h 20mSWISS
Tue 7/159:00 pmBIO - SFO
2 stops31h 45mSWISS
Deal found 6/10$802
This American Airlines deal was found by Cheapflights users on 6/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/35:45 pmSFO - BIO
1 stop18h 05mAmerican Airlines
Thu 7/249:15 amBIO - SFO
2 stops20h 17mAmerican Airlines
Deal found 6/12$909
This KLM deal was found by Cheapflights users on 6/10. 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.
Sun 6/228:25 pmSFO - BIO
1 stop16h 35mKLM
Mon 6/3012:00 pmBIO - SFO
1 stop32h 45mKLM
Deal found 6/10$958

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 June 12, 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 8/19

7:30 pm-5:15 pm

1 stop36h 45m

Bilbao

Wed 8/27

6:45 am-7:57 pm

2 stops22h 12m

$565

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Tue 8/19

11:35 am-10:45 am

1 stop14h 10m

Bilbao

Wed 8/27

6:45 am-7:50 pm

1 stop22h 05m

$573

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Tue 8/19

9:05 pm-11:25 pm

1 stop17h 20m

Bilbao

Wed 8/27

6:45 am-12:40 pm

1 stop14h 55m

$590

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Mon 8/4

11:59 pm-11:00 am

2 stops26h 01m

Bilbao

Tue 8/19

12:00 pm-11:45 am

1 stop32h 45m

$626

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Thu 8/21

5:45 pm-8:30 am

1 stop29h 45m

Bilbao

Mon 9/1

5:35 pm-8:33 pm

2 stops35h 58m

$724

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Mon 6/30

12:55 pm-8:15 pm

2 stops22h 20m

Bilbao

Tue 7/15

9:00 pm-7:45 pm

2 stops31h 45m

$802

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Sun 6/29

9:03 pm-5:50 pm

2 stops35h 47m

Bilbao

Mon 7/14

6:45 am-9:42 pm

2 stops23h 57m

$852

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Thu 7/3

5:45 pm-8:50 pm

1 stop18h 05m

Bilbao

Thu 7/24

9:15 am-8:32 pm

2 stops20h 17m

$909

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Sun 6/22

8:25 pm-10:00 pm

1 stop16h 35m

Bilbao

Mon 6/30

12:00 pm-11:45 am

1 stop32h 45m

$958

San FranciscoBilbao

SFO - BIO

SFOBIO

San Francisco

Mon 8/11

6:00 am-3:15 pm

2 stops48h 15m

$280

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 25 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 June 9, 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 $1,139). 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 June 12, 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 June 12, 2025.
Read reviews from past customers who have flown Delta, KLM and Air France 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
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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.
Air France
7.5
Good
1,463 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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
1,623 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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 $573, United Airlines will fly you from San Francisco to Bilbao and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Lufthansa and Delta - these airlines can fly you to your destination from $590 and $626, respectively. United Airlines is 37% 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 TAP AIR PORTUGAL. According to our data, you can fly for as low as $350. Users have also found prices from $365 and $368 on Vueling and Iberia, 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 $1,139). 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

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Top 8 airlines flying from San Francisco to Bilbao

Discover the top 8 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
LEVELCheapest$436Average$791FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$556Average$966FlexibilityNo cancel feeOn-time76%
SWISSCheapest$597Average$695FlexibilityNo cancel feeOn-time79%
Air FranceCheapest$599Average$1,275FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$606Average$989FlexibilityNo cancel feeOn-time69%
KLMCheapest$620Average$869FlexibilityNo cancel feeOn-time75%
DeltaCheapest$629Average$929FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$727Average$1,109FlexibilityNo cancel feeOn-time77%

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