$538+ Cheap flights from Bilbao (BIO) to San Francisco (SFO)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
BIO — SFO
Nov 4 — Nov 111
Round-trip
1 adult, Economy
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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
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Bilbao to San Francisco
Cheapest
Best
Last-minute
One-way
Cheapest flights from Bilbao to San FranciscoExplore 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 October 5, 2026.
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 October 5, 2026.
This Iberia deal was found by Cheapflights users on 10/4. 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 12/39:15 am -
2 stops19h 55m
Thu 12/106:38 am -
2 stops16h 52m
Deal found 10/4![Iberia logo]()
$579
This Iberia deal was found by Cheapflights users on 10/4. 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 11/189:15 am -
2 stops19h 44m
Wed 11/252:07 pm -
2 stops19h 43m
Deal found 10/4![Iberia logo]()
$581
This American Airlines deal was found by Cheapflights users on 10/3. 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.
Sun 11/89:15 am -
2 stops20h 12m
Mon 11/238:47 am -
2 stops19h 03m
Deal found 10/3![American Airlines logo]()
$612
This Gotogate deal was found by Cheapflights users on 10/1. 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.
Sun 11/86:40 pm -
1 stop28h 45m
Mon 11/234:35 pm -
1 stop16h 20m
Deal found 10/1![TAP AIR PORTUGAL logo]()
$635
This Gotogate deal was found by Cheapflights users on 10/1. 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.
Fri 11/207:20 pm -
1 stop28h 25m
Sat 12/54:35 pm -
1 stop16h 20m
Deal found 10/1![TAP AIR PORTUGAL logo]()
$638
This Iberia deal was found by Cheapflights users on 10/1. 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.
Fri 11/209:15 am -
2 stops21h 50m
Sat 12/57:25 am -
2 stops20h 05m
Deal found 10/1![Iberia logo]()
$640
Best flights from Bilbao to San FranciscoDiscover carefully curated flight deals from Bilbao to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 5, 2026.
Discover carefully curated flight deals from Bilbao to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 5, 2026.
This Iberia deal was found by Cheapflights users on 10/4. 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 1/149:15 am -
2 stops21h 31m
Mon 1/187:50 am -
2 stops20h 00m
Deal found 10/4![Iberia logo]()
$579
This British Airways deal was found by Cheapflights users on 10/4. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/149:15 am -
2 stops21h 15m
Mon 1/185:25 pm -
1 stop16h 10m
Deal found 10/4![British Airways logo]()
$697
This United Airlines deal was found by Cheapflights users on 10/4. 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 1/147:30 am -
1 stop16h 20m
Mon 1/189:40 pm -
1 stop16h 30m
Deal found 10/4![United Airlines logo]()
$716
This Delta deal was found by Cheapflights users on 10/1. 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.
Fri 11/206:50 am -
1 stop13h 55m
Sat 12/59:59 am -
2 stops22h 26m
Deal found 10/1![Delta logo]()
$723
This United Airlines deal was found by Cheapflights users on 9/30. 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.
Sun 11/86:45 am -
1 stop14h 50m
Mon 11/2311:50 pm -
2 stops26h 10m
Deal found 9/30![United Airlines logo]()
$720
This United Airlines deal was found by Cheapflights users on 10/4. 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 12/36:45 am -
1 stop14h 50m
Thu 12/109:40 pm -
1 stop15h 15m
Deal found 10/4![United Airlines logo]()
$737
This United Airlines deal was found by Cheapflights users on 10/3. 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 11/206:45 am -
2 stops18h 50m
Sat 12/59:40 pm -
1 stop16h 40m
Deal found 10/3![United Airlines logo]()
$743
Last-minute flights from Bilbao to San FranciscoDiscover last-minute flight deals from Bilbao to San Francisco. Data last updated October 5, 2026 and is based on user searches.
Discover last-minute flight deals from Bilbao to San Francisco. Data last updated October 5, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 10/3. 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.
Sun 11/89:15 am -
2 stops20h 12m
Mon 11/238:47 am -
2 stops19h 03m
Deal found 10/3![American Airlines logo]()
$612
This Gotogate deal was found by Cheapflights users on 10/1. 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.
Sun 11/86:40 pm -
1 stop28h 45m
Mon 11/234:35 pm -
1 stop16h 20m
Deal found 10/1![TAP AIR PORTUGAL logo]()
$635
This Flightnetwork deal was found by Cheapflights users on 10/2. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/86:45 am -
1 stop14h 50m
Mon 11/239:40 pm -
1 stop16h 30m
Deal found 10/2![Lufthansa logo]()
$706
This Delta deal was found by Cheapflights users on 10/3. 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.
Sun 11/86:50 am -
1 stop13h 55m
Mon 11/239:56 am -
2 stops22h 29m
Deal found 10/3![Delta logo]()
$717
This Iberia deal was found by Cheapflights users on 10/4. 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 11/189:15 am -
2 stops19h 44m
Wed 11/252:07 pm -
2 stops19h 43m
Deal found 10/4![Iberia logo]()
$581
This Gotogate deal was found by Cheapflights users on 10/1. 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.
Fri 11/207:20 pm -
1 stop28h 25m
Sat 12/54:35 pm -
1 stop16h 20m
Deal found 10/1![TAP AIR PORTUGAL logo]()
$638
This Iberia deal was found by Cheapflights users on 10/1. 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.
Fri 11/209:15 am -
2 stops21h 50m
Sat 12/57:25 am -
2 stops20h 05m
Deal found 10/1![Iberia logo]()
$640
One-way flights from Bilbao to San FranciscoSearch for one-way flight options from Bilbao to San Francisco. Find affordable one-way fares based on user searches. Data last updated October 5, 2026.
Search for one-way flight options from Bilbao to San Francisco. Find affordable one-way fares based on user searches. Data last updated October 5, 2026.
This Mytrip deal was found by Cheapflights users on 10/3. 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.
Tue 10/2010:50 pm -
2 stops24h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/3![Multiple Airlines logo]()
$538
This Kiwi.com deal was found by Cheapflights users on 10/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:40 pm -
2 stops36h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![Multiple Airlines logo]()
$550
This Kiwi.com deal was found by Cheapflights users on 10/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/269:05 pm -
2 stops50h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![Multiple Airlines logo]()
$551
This Kiwi.com deal was found by Cheapflights users on 10/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:00 am -
2 stops40h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![Multiple Airlines logo]()
$555
This Kiwi.com deal was found by Cheapflights users on 10/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/249:05 pm -
2 stops51h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![Multiple Airlines logo]()
$558
This Kiwi.com deal was found by Cheapflights users on 10/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/299:35 pm -
2 stops50h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![Multiple Airlines logo]()
$559
This Kiwi.com deal was found by Cheapflights users on 10/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/313:15 pm -
3 stops50h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![Multiple Airlines logo]()
$563
This Kiwi.com deal was found by Cheapflights users on 10/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:45 am -
2 stops41h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![Multiple Airlines logo]()
$583
This Kiwi.com deal was found by Cheapflights users on 10/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/258:30 am -
2 stops38h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/3![Multiple Airlines logo]()
$594
Find 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 October 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $539 (Iberia) |
One-way from | $538 (Mytrip) |
Popular in | July |
Cheapest in | June |
Average price | $739 |
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 7,457,451 searches. Data last updated October 5, 2026.
Use the filters below to find and compare flights from Bilbao to San Francisco that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BilbaoSan Francisco
BIO Bilbao - SFO San Francisco
BIOSFO
Bilbao
Tue 10/20
10:50 pm-2:35 pm
2 stops24h 45m
San Francisco
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$538
BilbaoSan Francisco
BIO Bilbao - SFO San Francisco
BIOSFO
Bilbao
Thu 1/14
9:15 am-9:46 pm
2 stops21h 31m
San Francisco
Mon 1/18
7:50 am-12:50 pm
2 stops20h 00m
$579
BilbaoSan Francisco
BIO Bilbao - SFO San Francisco
BIOSFO
Bilbao
Tue 10/20
6:50 pm-2:35 pm
1 stop28h 45m
San Francisco
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$595
BilbaoSan Francisco
BIO Bilbao - SFO San Francisco
BIOSFO
Bilbao
Wed 10/14
6:05 pm-3:50 pm
1 stop30h 45m
San Francisco
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$609
BilbaoSan Francisco
BIO Bilbao - SFO San Francisco
BIOSFO
Bilbao
Tue 10/27
6:40 pm-3:45 pm
1 stop29h 05m
San Francisco
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$619
BilbaoSan Francisco
BIO Bilbao - SFO San Francisco
BIOSFO
Bilbao
Sun 10/25
7:00 am-3:25 pm
3 stops40h 25m
San Francisco
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$621
BilbaoSan Francisco
BIO Bilbao - SFO San Francisco
BIOSFO
Bilbao
Tue 10/13
10:20 am-2:35 pm
2 stops37h 15m
San Francisco
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$628
BilbaoSan Francisco
BIO Bilbao - SFO San Francisco
BIOSFO
Bilbao
Wed 10/14
1:05 pm-2:30 pm
2 stops34h 25m
San Francisco
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$659
BilbaoSan Francisco
BIO Bilbao - SFO San Francisco
BIOSFO
Bilbao
Tue 10/13
6:05 pm-3:55 pm
1 stop30h 50m
San Francisco
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$660
BilbaoSan Francisco
BIO Bilbao - SFO San Francisco
BIOSFO
Bilbao
Thu 10/15
8:05 am-8:38 pm
3 stops45h 33m
San Francisco
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$695
Showing 1-10 of 18 resultsSorted by cheapest first
- 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.
BIO-SFO
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?
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 26 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, June is the cheapest month in which you can book a flight from Bilbao to San Francisco (average of $553). Flying from Bilbao to San Francisco in July is currently the most expensive (average of $968). 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.
How much does it cost to fly round-trip from Bilbao to San Francisco?
Airfare is below average for this route at the moment.
Bilbao to San Francisco flights typically cost between $632 and $754 in January.The cheapest round-trip price found within the last 5 days was $539 on Iberia (Jan 15-Jan 28).
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 October 5, 2026.
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.
Boarding
7.7
Comfort
7.3
Entertainment
7.1
Food
6.7
Overall
7.4
Crew
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,Sep 2025
FRA - SFO
Boarding
7.7
Comfort
7.3
Entertainment
7.1
Food
6.7
Overall
7.4
Crew
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,Sep 2025
FRA - SFO
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.
Traveling to a place near San Francisco?
Book flights to San Francisco if you plan to visit one of these locationsSouth San Francisco
Santa Clara
Santa Cruz
Walnut Creek
San Bruno
Emeryville
Hayward
Burlingame
Rancho Cordova
Roseville
Redwood City
Cupertino
Newark
Fairfield
San Ramon
Manteca
Vallejo
San Carlos
Turlock
Davis
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Alternative routes for Bilbao to San Francisco
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Complete your trip
Complete your trip to San Francisco by adding a car rental and/or hotel reservation to your travel itinerary.
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Bilbao and San Francisco flights
Browse other Bilbao and San Francisco flight options. Last updated on October 5, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to San Francisco
Explore flights to San Francisco departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 5, 2026.
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 7,457,451 searches. Data last updated October 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$768 | Average$917 | FlexibilityNo cancel fee | On-time69% |