SFO - BIO

$329 Find Cheap Flights from San Francisco to Bilbao

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Bilbao departing on 8/18. 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 Bilbao

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Bilbao.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Bilbao.
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Everything you should know

Cheapest round-trip
$555
Typical prices: $955-$679
TAP AIR PORTUGAL
Sat 4/18Mon 5/4
SFO - BIO • 1 stop
Cheapest one-way
$329
Typical prices: $447-$637
Iberia
Tue 8/18
SFO - BIO • 2 stops
Top airlines
Cheapest • from $555 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between San Francisco and Bilbao. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $441 (round-trip)
Shortest trip • 14h 45m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 18% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 30% price drop
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 Bilbao!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to Bilbao 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 San Francisco to Bilbao

Sat, Apr 18 - Mon, May 4
TAP AIR PORTUGAL Logo
7:35 pm - 11:40 am
SFO
-
BIO
31h 05m
1 stop
TAP AIR PORTUGAL Logo
12:25 pm - 2:35 pm
BIO
-
SFO
35h 10m
1 stop
$555TAP AIR PORTUGAL
Tue, Apr 14 - Thu, Apr 23
TAP AIR PORTUGAL Logo
4:35 pm - 11:30 am
SFO
-
BIO
33h 55m
1 stop
TAP AIR PORTUGAL Logo
12:15 pm - 4:50 pm
BIO
-
SFO
37h 35m
1 stop
$562TAP AIR PORTUGAL
Thu, Apr 16 - Wed, Apr 22
TAP AIR PORTUGAL Logo
7:55 pm - 5:35 pm
SFO
-
BIO
36h 40m
1 stop
TAP AIR PORTUGAL Logo
12:25 pm - 4:20 pm
BIO
-
SFO
36h 55m
1 stop
$570TAP AIR PORTUGAL
Tue, Apr 14 - Wed, Apr 22
TAP AIR PORTUGAL Logo
4:35 pm - 11:30 am
SFO
-
BIO
33h 55m
1 stop
TAP AIR PORTUGAL Logo
12:25 pm - 4:20 pm
BIO
-
SFO
36h 55m
1 stop
$571TAP AIR PORTUGAL
Tue, Apr 14 - Tue, Apr 21
Turkish Airlines Logo
6:45 pm - 5:20 pm
SFO
-
BIO
37h 35m
1 stop
Turkish Airlines Logo
12:10 pm - 4:40 pm
BIO
-
SFO
37h 30m
1 stop
$632Turkish Airlines
Tue, Apr 7 - Wed, Apr 29
Turkish Airlines Logo
6:45 pm - 5:20 pm
SFO
-
BIO
37h 35m
1 stop
Turkish Airlines Logo
6:20 pm - 4:40 pm
BIO
-
SFO
31h 20m
1 stop
$639Turkish Airlines
Thu, May 7 - Thu, May 14
Turkish Airlines Logo
6:45 pm - 11:10 am
SFO
-
BIO
31h 25m
1 stop
Turkish Airlines Logo
6:20 pm - 10:50 am
BIO
-
SFO
25h 30m
1 stop
$641Turkish Airlines
Tue, Apr 7 - Wed, Apr 29
Turkish Airlines Logo
12:55 pm - 5:20 pm
SFO
-
BIO
19h 25m
1 stop
Turkish Airlines Logo
6:20 pm - 4:40 pm
BIO
-
SFO
31h 20m
1 stop
$652Turkish Airlines
Wed, Apr 15 - Thu, Apr 23
Turkish Airlines Logo
6:45 pm - 11:10 am
SFO
-
BIO
31h 25m
1 stop
Turkish Airlines Logo
6:20 pm - 10:50 am
BIO
-
SFO
25h 30m
1 stop
$677Turkish Airlines
Mon, May 4 - Mon, May 11
Turkish Airlines Logo
6:45 pm - 5:20 pm
SFO
-
BIO
37h 35m
1 stop
Turkish Airlines Logo
12:10 pm - 10:50 am
BIO
-
SFO
31h 40m
1 stop
$680Turkish Airlines
Booking Insights

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

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

How much is a round-trip flight from San Francisco to Bilbao?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from San Francisco to Bilbao departing in April.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Francisco to Bilbao, 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 San Francisco to Bilbao is October, where tickets cost $556 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,162 and $962 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Francisco to Bilbao, 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 San Francisco to Bilbao, you should book around 3 weeks before departure, which saves you about 18% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 17 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$329
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly with an average 46% increase in price.
Flight from San Francisco to Bilbao

When to book flights from San Francisco to Bilbao

Are your dates flexible? Find out the best times to travel from San Francisco to Bilbao 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 San Francisco to Bilbao

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

    In the last 3 days, the lowest price for a flight from San Francisco to Bilbao was $394 for a one-way ticket and $555 for a round-trip.

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

    Yes, you’ll need a passport to travel to Bilbao from San Francisco.

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

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

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

    SkyTeam, and Star Alliance are the airline alliances operating flights between San Francisco and Bilbao, with SkyTeam being the most commonly used for this route.

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

    The two airlines most popular with KAYAK users for flights from San Francisco to Bilbao are Delta and KLM. With an average price for the route of $803 and an overall rating of 7.9, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $649 and an overall rating of 7.8.

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

    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 San Francisco to Bilbao.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Bilbao from San Francisco 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 San Francisco to Bilbao?

    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 Bilbao with an airline and back to San Francisco with another airline. Booking your flights between San Francisco and BIO 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 San Francisco to Bilbao?

    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 Bilbao from San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from San Francisco to Bilbao

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to Bilbao. 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 San Francisco to Bilbao? 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.
7.9
DeltaOverall score based on 8355 reviews
7.9Comfort
8.5Crew
7.8Entertainment
7.2Food
8.1Boarding
Airline reviews

I took seat 15A in anticipation of window seat, there is no window.

2.0 MediocreDileep, Mar 2026
SMF - ATL
Read more Delta reviews

I took seat 15A in anticipation of window seat, there is no window.

Flight late, the waited for a long time for “personal” to arrive at gate to dock the plane in Rochester. So annoying. This flight was expected, why aren’t personel available for the jet bridge?

My recent experience was excellent on Delta! I flew with Delta Comfort and I was really comfortable in my seat. I enjoyed the in-flight service. The flight attendants were so friendly and hospitable. I love the snack on the flight as well. This was my first time flying on Delta and I will definitely consider flying with them again.

My flight was canceled on Sunday. Rebooking took three hours. Had to pay for accommodations another night. New flight was delayed for 5 hours, all that was sent was a 12 dollar food voucher, which doesn’t tell you how to use it. Then when we landed we had to sit on the plane for an hour before we could get off.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Flight was delayed by 3-hours and their fix was… complimentary pretzels.

The crew, and fellow passengers, were super gracious and kind. There seemed to be plenty of bin space even though the plane was full. It’s nice to get a glass of wine with dinner in Premiere seating, and there was a lot of food.

Everything I mentioned earlier - the airbus was more comfortable indeed and the experience was further enhanced.

The plane was an older model, so it wasn’t as comfortable as others. The flight attendants were not helpful during onboarding. It was a full flight so there was chaos finding space for baggage.

Awesome! On time flight, early arrival, and a complimentary upgrade!

It was really nice experience by flying this klm flight.I personally recommend everyone to please try this klm flight

It was really nice journey i personally recommend klm flight

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

Empty seats next to me - wish it had been for a longer flight!!

I’m grateful for the KLM Air France shuttle bus service to Ottawa. However due to construction and other issues related to the chaotic Uber pickup system at YUL, it’s a challenge to find the Kelios bus service to Ottawa. The signs are not clear or even available. No staff to guide passengers. It’s a stressful experience.

Flight was on time, staff are friendly and helpful onboard.

Terrible last row seats many seats available but no offer to move to better seat

Delay on my previous leg, had to run to catch my flight. But that happens. Overall ok.

At the airport, terrible, I do not want to even remember it. It was too humiliating for a business class passenger.

Flight was ok but lack of communication cost me to literally beg to be put on another flight as connecting flight had departed

They delayed the flight from 9:00 to 11:55 At 11:45 they canceled the flight. I paid a premium price for the tickets with poor service

The 777’s economy seat’s legroom was more tolerable than expected. I appreciate the reclining mechanism which slides the seat forward to minimize cannibalizing the space behind. The food was terrible: very salty.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

Staff were good. My seat was in need of repair, but for a short flight was not problematic. Usual basic snack and drink setup that you'll find on any US carrier. Over, a decent, basic flight.

Flight delayed for more than 16 hrs and no effort was spent to provide an alternate

We had turbulence ever 1/2 hr or so and the captains announcements were SOOOO LOUD

it was a very short flight so my expectations were low.

Entertainment kept turning itself off. Gave up on watching a movie.

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Terrible. No customer service, no food, no drinks on a 6 hour premier economy booking.

Lufthansa cancelled our flight from Los Angeles to Naples Italy on March 10 for scheduled flight on March 12 Very stressful experience trying to arrange alternatives. Will never fly again with Lufthansa

Service and food were excellent. Incredibly friendly and competent staff. Flight was delayed over and hour and I had to run between terminals to get my connecting flight.

Late flight Delays Poor service Poor staff Worst airline ever

Lufthansa still has a good level of quality compared to US airlines, especially with respect to (1) food quality - actually tasty, (2) good French red wine - free, (3) good movie selection. Also my ticket price includes 1 free check-in luggage, while some other budget airlines sneak in an extra $150 for a checkin.

The food could be better, more snacks. And have some plugs to chargue the phone.

Everything was really great just The aircraft was too old and sounded it will break during takeoff

Extremely pleased with the crew. Best flight attendants ever! Very friendly, genuinely caring and attentive.

Best flight attendants ever! Very customer and service oriented, courteous, professional and helpful.

Cheapest airlines I have ever been on. I got downgraded and never got on united. I got rerouted through Vancouver onto jetwesf

It was good although we could not land in Munich due to weather and we had to go to Stuttgart. Missed our second flight. They did get us on another flight but the seats where not the ones I paid for in the flight that we missed.

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

Information on your arrival and departure airports