BIO - SFO

$333 Find Cheap Flights from Bilbao to San Francisco

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Bilbao to San Francisco departing on 6/6. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San Francisco

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Bilbao to San Francisco, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Bilbao to San Francisco, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$483
Overall average: $686
American Airlines
Wed 3/4Tue 3/10
BIO - SFO • 2 stops
Cheapest one-way
$333
Typical prices: $741-$1,147
Multiple Airlines
Sat 6/6
BIO - SFO • 1 stop
Top airlines
American Airlines
Cheapest • from $483 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 33% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 11% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Francisco!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Bilbao to San Francisco (BIO-SFO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Bilbao to San Francisco that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Bilbao to San Francisco

Wed, Mar 4 - Tue, Mar 10
American Airlines Logo
1:35 pm - 12:52 am
BIO
-
SFO
20h 17m
2 stops
American Airlines Logo
10:03 am - 12:50 pm
SFO
-
BIO
18h 47m
2 stops
$483American Airlines
Tue, Mar 10 - Mon, Mar 23
American Airlines Logo
9:15 am - 10:32 pm
BIO
-
SFO
21h 17m
2 stops
American Airlines Logo
7:25 am - 12:50 pm
SFO
-
BIO
21h 25m
2 stops
$487American Airlines
Tue, Mar 10 - Mon, Mar 23
American Airlines Logo
9:15 am - 10:32 pm
BIO
-
SFO
21h 17m
2 stops
American Airlines Logo
10:03 am - 12:50 pm
SFO
-
BIO
18h 47m
2 stops
$488American Airlines
Tue, Mar 10 - Mon, Mar 23
American Airlines Logo
9:15 am - 10:32 pm
BIO
-
SFO
21h 17m
2 stops
American Airlines Logo
7:25 am - 12:50 pm
SFO
-
BIO
21h 25m
2 stops
$489American Airlines
Fri, Feb 27 - Sun, Mar 8
Iberia Logo
6:45 am - 10:40 pm
BIO
-
SFO
24h 55m
2 stops
Iberia Logo
6:00 am - 12:50 pm
SFO
-
BIO
22h 50m
2 stops
$493Iberia
Fri, Feb 27 - Mon, Mar 2
Iberia Logo
6:45 am - 9:16 pm
BIO
-
SFO
23h 31m
2 stops
Iberia Logo
6:15 am - 12:50 pm
SFO
-
BIO
21h 35m
2 stops
$509Iberia
Fri, Feb 27 - Mon, Mar 2
Iberia Logo
6:45 am - 9:16 pm
BIO
-
SFO
23h 31m
2 stops
Iberia Logo
6:15 am - 12:50 pm
SFO
-
BIO
21h 35m
2 stops
$510Iberia
Fri, Feb 27 - Mon, Mar 2
Iberia Logo
9:15 am - 10:40 pm
BIO
-
SFO
22h 25m
2 stops
Iberia Logo
6:00 am - 12:50 pm
SFO
-
BIO
21h 50m
2 stops
$511Iberia
Wed, Apr 8 - Mon, Apr 13
Iberia Logo
1:30 pm - 11:59 pm
BIO
-
SFO
19h 29m
2 stops
Iberia Logo
1:40 pm - 4:55 pm
SFO
-
BIO
18h 15m
2 stops
$514Iberia
Wed, Apr 8 - Mon, Apr 13
Iberia Logo
1:30 pm - 11:59 pm
BIO
-
SFO
19h 29m
2 stops
Iberia Logo
12:06 pm - 4:55 pm
SFO
-
BIO
19h 49m
2 stops
$515Iberia
Booking Insights

KAYAK's insights & trends for Bilbao to San Francisco flights

Get data-powered insights and trends into flights from Bilbao to San Francisco to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Bilbao to San Francisco?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Bilbao to San Francisco, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Bilbao to San Francisco is January, where tickets cost $596 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is $875 and $792 respectively.

How far in advance should I book a flight from Bilbao to San Francisco?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Bilbao to San Francisco, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Bilbao to San Francisco, you should book around 4 weeks before departure, which saves you about 33% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Find deals

Good to know

Low seasonJanuary
Cheapest flight$333
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly with an average 18% increase in price.
Flight from Bilbao to San Francisco

When to book flights from Bilbao to San Francisco

Are your dates flexible? Find out the best times to travel from Bilbao to San Francisco based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Bilbao to San Francisco

  • What flights from Bilbao to San Francisco are the most eco-friendly?

    On flights to San Francisco from Bilbao, each person emits about 5,271 lbs of CO2. You can find greener flights with KAYAK’s “Less CO2” sort, such as Delta’s flights through Amsterdam and Minneapolis, on which you could save about 44%, or 2,285 lbs of CO2. For flights with only one layover, you could choose Air France through Paris, which would still save about 36%, or 1,884 lbs of CO2.

  • Will I be able to collect frequent flyer points or miles from my flight to San Francisco from Bilbao?

    You can use the “Alliance” filter to only see options that should help you accrue miles for your frequent flyer program. For example, if you belong to United’s MileagePlus program, you can set the “Alliance” filter to “Star Alliance” and only see United flights and those with alliance partners like Lufthansa and Turkish Airlines.

  • How long will I have to wait between connections on my flight from Bilbao to San Francisco?

    You may have connections as you travel to San Francisco, but you do not need to wait too long. Under the “Duration” filter of your KAYAK search, you can set the “Layover” setting to find flights such as Lufthansa – with a stop in Munich for under 3 hours, enough to stretch your legs and maybe do a little duty-free shopping before your flight to San Francisco.

  • Will there be in-flight entertainment on my trip to San Francisco from Bilbao?

    If you want to know what onboard entertainment will help you pass the time from Bilbao to San Francisco, you can expand the flight information on your KAYAK results to see, for example, that TAP AIR may only have limited Wi-Fi on the first leg to Lisbon, but then you’ll get a seat back console for on-demand content on the longer flight to San Francisco.

  • What is the cheapest flight from Bilbao to San Francisco?

    In the last 3 days, the lowest price for a flight from Bilbao to San Francisco was $333 for a one-way ticket and $483 for a round-trip.

  • Do I need a passport to fly between Bilbao and San Francisco?

    Yes

  • Which aircraft models fly most regularly from Bilbao to San Francisco?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Bilbao to San Francisco?

    Star Alliance is the only airline alliance operating flights between Bilbao and San Francisco.

  • How does KAYAK find such low prices on flights from Bilbao to San Francisco?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Bilbao to San Francisco.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Bilbao to San Francisco?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from Bilbao is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Bilbao to San Francisco?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back to Bilbao with another airline. Booking your flights between Bilbao and SFO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Bilbao to San Francisco?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from Bilbao up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Bilbao to San Francisco

  • Most flights to San Francisco (SFO) from Bilbao (BIO) have layovers. Iberia, for example, typically stops in Madrid and then Washington, D.C. or Los Angeles. If you prefer one stop, Lufthansa usually stops in Frankfurt or Munich, while Delta often stops in Amsterdam or Paris.
  • If you are flying to San Francisco from Bilbao with TAP Air Discount Economy, you can bring a carry-on that is no bigger than 22 × 16 × 8 inches and weighs no more than 22 lbs. You are also allowed a personal item, such as a laptop bag or purse, which cannot be bigger than 16 × 12 × 5 inches or weigh over 4.4 lbs.
  • Want to get comfortable in a lounge while you wait for your flight to San Francisco? At Bilbao Airport (BIO), you can pay for access to the VIP Lounge, located on the mezzanine level of the boarding area. You can relax and get a bite to eat or something to drink in comfort.
  • If you are flying with an infant to San Francisco from Bilbao, Lufthansa allows certain strollers and prams on board, free of charge as an added carry-on item, and can provide a bassinet upon request. You need to inform the airline at least 52 hours before your flight, and there may be a fee for the bassinet.
  • For public transportation from San Francisco Airport (SFO) to downtown, there is a BART train station in the International Terminal that you can take to various locations in the city. In addition, there are SamTrans public bus stops outside the baggage claim areas of Terminals 2 and 3 and the International Terminal.

Reviews of the top airline flying from Bilbao to San Francisco

 
See real verified KAYAK customer reviews for airlines flying from Bilbao to San Francisco. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Bilbao to San Francisco? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9289 reviews
7.3Comfort
6.6Food
8.1Crew
7.7Boarding
7.1Entertainment
Airline reviews

the whole trip was smooth, and as comfortable as flying is these days. flight crew was friendly and very courteous and helpful.

10.0 ExcellentJanaki, Feb 2026
PDX - SFO
Read more United Airlines reviews

the whole trip was smooth, and as comfortable as flying is these days. flight crew was friendly and very courteous and helpful.

Very poor. The flight was delayed from Toronto because some forget to do there job . I got to my connecting gate in San Francisco 10 minutes before the departure.but this didn’t let me board even though the flight was still there for an other 30 minutes. The the gentleman at the unite airline desk told me that they usually wait for passengers but air Canada called and told them not to we I been rerouted to Manila instead of Hong Kong . In San Francisco they mad me check in my carryon bag . I was told the it will directly go yo ho chi minn cuyt but I was told that by the Vietnams airline desk that’s not there I’m 10 hours behind my scheduled flight and looks like I I’m going without baggage. I don’t have a chance of catching ..

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Mean flight attendant. I wanted to reuse my plastic cup, but he (Matthew) said he can't for safety. I then said "I don't want water then" and he poured me a glass. I hope Matthew gets herpes and spends the rest of his life poor, lonely, and homeless.

Yet another flight in which beverage and snack service was skipped. Other that that, firmly mediocre. Landed early, to gate late due to congestion at the gates. Airline's fault or airports fault: unknown.

Both flights delayed. 2nd flight over 3 hours late mechanical issues

It was good but only meal served is very less. Meantime good to add rice and chicken in one of meal

Teeny tiny bathrooms, crew was not realistic about when we'd arrive.

On the way my flight entertainment wouldn’t work the screen went black and no matter how many times I tried to turn it on it wouldn’t. Food was surprisingly good but the tray tables were tiny so you couldn’t get anything else on the table. The seats hardly go back and are not overly comfortable. Wouldn’t fly United again.

Everything you need to know for your flight from Bilbao to San Francisco

Information on your arrival and departure airports

Bilbao (BIO)
San Francisco (SFO)