BIO - SFO

$386 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 10/7. 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

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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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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Bilbao to San Francisco

Mon, Sep 22 - Tue, Oct 7
TAP AIR PORTUGAL Logo
12:25 pm - 1:35 pmBIO-SFO
34h 10m1 stop
TAP AIR PORTUGAL Logo
4:20 pm - 11:30 amSFO-BIO
34h 10m1 stop
$432TAP AIR PORTUGAL
Find Deal
Wed, Oct 22 - Wed, Jan 14
American Airlines Logo
9:15 am - 8:27 pmBIO-SFO
20h 12m2 stops
American Airlines Logo
10:40 am - 12:50 pmSFO-BIO
17h 10m2 stops
$522American Airlines
Find Deal
Mon, Nov 17 - Mon, Nov 24
Iberia Logo
7:10 am - 10:58 pmBIO-SFO
24h 48m2 stops
Iberia Logo
8:00 am - 12:50 pmSFO-BIO
19h 50m2 stops
$547Iberia
Find Deal
Tue, Oct 14 - Sun, Oct 19
Iberia Logo
1:30 pm - 11:28 pmBIO-SFO
18h 58m2 stops
Iberia Logo
2:10 pm - 4:55 pmSFO-BIO
17h 45m2 stops
$557Iberia
Find Deal
Wed, Oct 29 - Wed, Jan 14
United Airlines Logo
7:25 am - 8:35 pmBIO-SFO
21h 10m1 stop
United Airlines Logo
1:30 pm - 6:05 pmSFO-BIO
19h 35m1 stop
$574United Airlines
Find Deal
Mon, Nov 17 - Fri, Nov 28
United Airlines Logo
6:45 am - 12:40 pmBIO-SFO
14h 55m1 stop
United Airlines Logo
1:30 pm - 11:20 pmSFO-BIO
24h 50m1 stop
$583United Airlines
Find Deal
Wed, Oct 1 - Fri, Oct 10
KLM Logo
12:00 pm - 11:45 amBIO-SFO
32h 45m1 stop
KLM Logo
1:45 pm - 10:45 pmSFO-BIO
24h 00m1 stop
$627KLM
Find Deal
Sat, Oct 18 - Sat, Nov 1
Lufthansa Logo
7:15 pm - 4:00 pmBIO-SFO
29h 45m1 stop
Lufthansa Logo
10:40 pm - 11:05 pmSFO-BIO
16h 25m1 stop
$639Lufthansa
Find Deal
Sat, Aug 30 - Sat, Sep 13
Lufthansa Logo
7:15 am - 7:00 pmBIO-SFO
20h 45m1 stop
Lufthansa Logo
1:20 pm - 10:50 pmSFO-BIO
24h 30m1 stop
$695Lufthansa
Find Deal
Wed, Oct 15 - Wed, Jan 7
KLM Logo
12:00 pm - 11:45 amBIO-SFO
32h 45m1 stop
KLM Logo
3:50 pm - 5:20 pmSFO-BIO
16h 30m1 stop
$760KLM
Find Deal
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’s the cheapest day of the week to fly from Bilbao to San Francisco?

The average price of all round-trip flights from Bilbao to San Francisco clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to San Francisco on a Wednesday and more expensive on a Saturday. On your return trip to Bilbao, you should consider flying back on a Sunday, and avoid Fridays for better deals.

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 $410 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is $878 and $809 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 42% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 18 weeks before departure.

Good to know

Low seasonNovember
Cheapest flight$386
Best time to beat the crowds with an average 19% drop in price.
Most popular time to fly with an average 5% 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 $386 for a one-way ticket and $432 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, oneworld, and SkyTeam are the airline alliances operating flights between Bilbao and San Francisco, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Bilbao to San Francisco, KLM or United Airlines?

    The two airlines most popular with KAYAK users for flights from Bilbao to San Francisco are KLM and United Airlines. With an average price for the route of $1,011 and an overall rating of 7.8, KLM is the most popular choice. United Airlines is also a great choice for the route, with an average price of $734 and an overall rating of 7.4.

  • 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 3 airlines serving 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.
7.8
KLMOverall score based on 1381 reviews
7.1Entertainment
8.4Crew
7.7Comfort
7.8Boarding
7.3Food
Airline reviews

Short flight so it was okay. Nice crew, all very pleasant and professional. We were near the back in row 27 so just as we got our drinks, we started our descent so had to drink very quickly!

8.0 ExcellentMark, Aug 2025BHX - AMS
Read more KLM reviews

Short flight so it was okay. Nice crew, all very pleasant and professional. We were near the back in row 27 so just as we got our drinks, we started our descent so had to drink very quickly!

The baggage drop-off in Stuttgart is bad: after online check-in you cannot use the automated baggage drop off as indicated on the website. You can use the terminals but have to cue to 1 of three open and slowly working counters to drop the bags. took about 45 minutes wait time.

Our first flight was delayed so we missed our connecting flight. However it was easy to book a later flight on their app.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

Legroom not all it could be, especially when the seat in front is reclined. Otherwise it was good, food and beverage were nice.

This portion of the flight was through Indigo. A local carrier. So all economy seating. No real service some refreshments for purchase standard economy stuff.

Transfer at Amsterdam airport is very convenient and the airport is easy to navigate. Boarding was also quick and easy. Cabin crew were excellent and the meals were good, although lacking in options.

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

I flew premium economy and this was a good option. Although the seats didn’t recline much, I was able to get some sleep with my head propped against the window. The food was good and the entertainment was wonderful The staff were very attentive and professional

1. when we went to check in, our 2 first class seats had been CANCELED and the flight was sold out. This was done without our prior knowledge. It was all we could do to restore one first class seat for my wife and I flew economy. 2, Our flight home was scheduled to leave at 10:30 pm. Due to tsunami warnings, the roads were closed and our flight status was uncertain as to whether it would leave as scheduled. It was announced that it would now leave at 11:20 pm and the roads were now open since the tsunami had come and gone. We made a mad dash to the airport and checked in. Delays were announced at 12:30 pm, 1:30 am, 2:30 am and at 3:30 am it was canceled. Since this was a flight due to natural (tsunami) causes, there was no compensation. We were told to return at 1:00 pm the next day and our baggage would be kept on the plane since the same plane was going to leave at 1:00 pm. We had to return to our hotel for the rest of the night. The same plane did not leave at 1:00 pm and our baggage was gone! All in all, it was a miserable performance by UA. Information was hard to obtain and no one knew what was going on and what was going to happen. Hundreds of passengers slept on the floor, chairs, etc. No food and no water was made available to the passengers. It was a situation where UA could care less what was going on. As a one million mile flyer, I had not experienced anything like this before and it was hugely disappointing!

I found the staff to not be very attentive at all. When paying for Business Class you expect a certain type of service and that was not found. They were almost rude even

Our experience on United Airlines was extremely poor. The plane was extremely cold throughout our entire flight- which multiple people complained about- and we had to wait 2 hours to get a blanket which was too thin and barely helped warm us up. As well as this, none of the entertainment features were working so we had to sit through a roughly 10 hour flight with nothing to keep our attention, including the actual flight path screen. It was an extremely disappointing experience and I would hope that this gets fixed if we ever choose United Airlines again.

I really enjoyed flying with United airlines amazing experience , good customer service and great food

1.It will be better if sandwich is warm. 2.The food is too salty. 3.Breakfast needs some vegetables or fruits.

Boarded plane and then delayed 1.5 hours while on the plane

It was all good flight was on time, service was good I enjoyed a few movies and everything was smooth

My flight was delayed a very short period of time but they did not hold my connecting flight to San Diego, also through United. So they closed the doors before we got off our plane. They would only have to help the door open for another five to ten minutes. So I missed a court deadline for a manditory mediation settlement conference for my client. I had to get an associate to be there in person and be on the phone with him relaying what he needs to do the entire time. The court was very upset with me and so was my client. United cannot be trusted.

Really good 😊 the woman at the gate entrance was a little rude checking in our carry-on but i dont think she worked for the airline, she worked for the airport at sacramento, other than that amazing.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

They don’t give information on why a flight is delayed in a timely manner. Very frustrating.

The flight was ok but chargers did not work and the speakers in the back of the cabin did not either. But I am writing because the crew was really, really rude and not only rude but had the curtains always closed, forgot to clear our trays, the bathrooms were filthy and trash was building out, and one of the attendants even had her EARBUDS on while in the cabin. From movement it seemed like she was listening to music, so not even the safety aspect was there. My neighbor s English is not good and they were very dismissive of her. when we deplaned the crew in the back was just chatting with one another and the first class attendant was briefly and said goodnight. It is nice that a crew gets along so well, but they did not take care of passengers at all. They rushed through all the services and otherwise did not go through the cabin to offer water or anything else. i had the feeling of being unwelcome at a party. I am not a grumpy traveller but I thought you really needed to know. Thank you, Carin

Food was terrible. They ran out of options and gave me a bland undercooked pasta and veggies. Only middle seat was available to select although I paid extra. Baggage delayed at destination. Flight attendants not really helpful.

Flight was late arriving. So, we left 25 min late. Pilot made some time up during the flight. Therefore, we arrived alittle past original time.

Crew was great. But my flight was late arriving and as a result, I missed my connecting flight to Richmond. I had to catch a later flight. On a positive note, the attendants at the counter were extremely helpful in booking my later flight. They book my on the next flight to Richmond.

If the plain wait for the passenger it should wait for the baggage!!

The plane (Mitsubishi CRJ) felt old, creaking and not very new. The crew was okay. Hot water provision was broken so hot beverages could't be served.

One one boarding scanner was working to scan 400+ passengers to an Airbus 380. Food in premium economy was mediocre.

Liked the flight being almost on time (airport issues created a delay). Disliked the issue printing tag bags on the kiosk and having to wait for an hour on like to drop my bags.

Our flight was delayed for over an hour due to weather, and it had already been a long travel day. However, the crew was calm and compassionate, listening to every complaint with genuine concern. They got us home safely without incident, in spite of all of the obstacles. I’m grateful.

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

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