SAN - BIO

$331 Find Cheap Flights from San Diego 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 Diego to Bilbao departing on 9/16. 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 Bilbao

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Diego to Bilbao, 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 San Diego to Bilbao, as well as popular online travel agencies
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Flights Deals

Cheap Flights from San Diego to Bilbao (SAN-BIO)

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

Mon, Aug 18 - Wed, Aug 27
 Logo
7:27 pm - 10:45 amSAN-BIO
30h 18m3 stops
 Logo
6:45 am - 7:38 pmBIO-SAN
21h 53m2 stops
Mon, Aug 18 - Wed, Aug 27
 Logo
10:30 pm - 10:45 amSAN-BIO
27h 15m1 stop
 Logo
6:45 am - 7:38 pmBIO-SAN
21h 53m2 stops
Tue, Sep 16 - Wed, Sep 24
United Airlines Logo
8:00 am - 10:45 amSAN-BIO
17h 45m2 stops
United Airlines Logo
6:45 am - 4:07 pmBIO-SAN
18h 22m2 stops
$658United Airlines
Find Deal
Mon, Aug 18 - Wed, Aug 27
United Airlines Logo
9:40 pm - 10:45 amSAN-BIO
28h 05m1 stop
United Airlines Logo
12:30 pm - 9:36 amBIO-SAN
30h 06m1 stop
$663United Airlines
Find Deal
Tue, Sep 16 - Wed, Sep 24
United Airlines Logo
5:15 pm - 11:25 pmSAN-BIO
21h 10m1 stop
United Airlines Logo
12:30 pm - 7:09 pmBIO-SAN
15h 39m1 stop
$671United Airlines
Find Deal
Mon, Aug 18 - Tue, Aug 26
 Logo
7:27 pm - 10:45 amSAN-BIO
30h 18m3 stops
 Logo
6:45 am - 7:38 pmBIO-SAN
45h 53m2 stops
Sat, Sep 13 - Tue, Sep 23
Lufthansa Logo
2:21 pm - 6:25 pmSAN-BIO
43h 04m2 stops
Lufthansa Logo
6:45 am - 6:23 pmBIO-SAN
20h 38m2 stops
$694Lufthansa
Find Deal
Sat, Sep 13 - Tue, Sep 23
Lufthansa Logo
2:21 pm - 6:25 pmSAN-BIO
43h 04m2 stops
Lufthansa Logo
7:15 am - 3:25 pmBIO-SAN
17h 10m1 stop
$700Lufthansa
Find Deal
Wed, Aug 13 - Wed, Aug 20
Iberia Logo
1:52 pm - 11:15 pmSAN-BIO
24h 23m2 stops
Iberia Logo
9:35 pm - 10:52 pmBIO-SAN
34h 17m2 stops
$720Iberia
Find Deal
Sat, Aug 30 - Tue, Sep 30
KLM Logo
10:37 am - 11:55 amSAN-BIO
16h 18m2 stops
KLM Logo
6:50 am - 12:00 pmBIO-SAN
14h 10m1 stop
$933KLM
Find Deal
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KAYAK's insights & trends for San Diego to Bilbao flights

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Diego 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 Diego to Bilbao is November, where tickets cost $686 (return) on average. On the other hand, the most expensive months are January and June, where the average cost of round-trip tickets is $3,040 and $1,643 respectively.

Good to know

Low seasonMarch
High seasonNovember
Cheapest flight$331
Best time to beat the crowds with an average 43% drop in price.
Most popular time to fly and prices are also 44% lower on average.
Flight from San Diego to Bilbao

When to book flights from San Diego to Bilbao

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

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

    In the last 3 days, the lowest price for a flight from San Diego to Bilbao was $331 for a one-way ticket and $650 for a round-trip.

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

    A passport is required to fly from San Diego to Bilbao.

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from San Diego to Bilbao are United Airlines and Lufthansa. With an average price for the route of $1,133 and an overall rating of 7.4, United Airlines is the most popular choice. Lufthansa is also a great choice for the route, with an average price of $1,202 and an overall rating of 6.8.

  • How does KAYAK find such low prices on flights from San Diego 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 Diego to Bilbao.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Bilbao from San Diego 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 Diego 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 Diego with another airline. Booking your flights between San Diego 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 Diego 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 Diego up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from San Diego to Bilbao

 
See real verified KAYAK customer reviews for airlines flying from San Diego 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 Diego 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.
7.4
United AirlinesOverall score based on 8852 reviews
7.7Boarding
7.0Entertainment
6.6Food
8.1Crew
7.3Comfort
Airline reviews

Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.

2.0 MediocreWilliam, Jun 2025SFO - SAN
Read more United Airlines reviews

Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.

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.

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

The food was the worst I’ve had on any flight I’ve ever been on.

I was supposed to be on business class at first class from Denver back to Miami due to weather changes. I missed my connection and it’s put on a flight to Fort Lauderdale. Instead of honoring my business class/1st class ticket, they put me in coach, but there were two first class seats open. I think it’s absolutely disgusting that I paid for first class $1300 ticket and they put me in economy and they had to open seats available and I have still not been refunded the difference. I ended up having to eat a snack box instead of the meal I was supposed to get and did not get home till 2 AM so I think that’s a little pathetic that I had to live off crackers for dinner And my poor dog ate some cheese and salami. Oh yes, apparently when they switched me to the new flight they forgot to mention I had a service dog

Flight was late as pilot crew had to land at different airport in their previous flight. Passengers boarded and had to wait for pilots inside plane. Series of incomplete and unnecessary announcements by an annoying voice, rather than complete, informative announcements.

Breakfast was not loaded at SFO due to catering company change. Seems like a major airline at a major hub would have thought of something else or warned passengers to pick up food before boarding a 3 hour flight.

Boarding seemed to be organized bedlam. For what ever reason, preboarding took longer than 20 minutes. Made the plane 20 minutes late taking off. Luckily we arrived on time. Flight crew seemed very friendly. Only slight turbulence.

They hired a new catering company the same day of my flight. They botched the job by not delivering the right carts and after THREE HOURS waiting, the flight crew timed out (flight was 19 hours long and FAA rules state crew can’t work more than 14 hours long). So they CANCELED OUR FLIGHT!! Worst experience ever. Avoid UAL at all costs.

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.

Very small and uncomfortable seats, Hard to hear entertainment system sound. Horrible food. Staff doesn't care much about the passengers. 2nd time they didn't give me my vegetarian meal. They asked me regular food with meat. The airline and staff was from United airlines.

Checkin took along timen only.few angents available at.checkin desk. Customer support over phone no existence

At baggage claim, I was given the wrong printed ticket. The ticket belonged to another passenger for a different flight — to Zurich instead of Frankfurt (layover). I was even allowed to pass security, and when I asked the Lufthansa employee if I was on the correct flight, and why it was changed. The employee said everything was correct and I should board. When I got on the plane, there was someone in my seat, and the crew on the plane finally realized that I was on the wrong plane. When I got off the plane, nobody was willing to help, and the security refused to provide my original printed ticket. That was until I showed them that I took a photo of the ticket; once they realized I had photographic evidence, they were suddenly ready to help me. The Lufthansa employee began communicating with other airlines and found a flight that would take me to my destination via Polish Airlines. I was required to once again go through security, re-check my bag, and once again pay for my checked bag and weight overage fees. This experience was incredibly stressful and very frustrating, as you can imagine. A Lufthansa employee told me I would be eligible for a refund. Please tell me what steps I need to take in order to make that happen. Thank you!

Good service … bus transfer upon arrival from plane to terminal: atrocious!!!

helpful and friendly. The Lufthanza people I dealt with before my holiday were so unhelpful by comparison.

My flight was late from US to Frankfurt so I missed my connecting flight flight and I had to wait for long to catch the next flight which was very tiring. Otherwise everyone was very nice.

Everything went really well. Snacks could be better and there was no tea/coffee service after dinner. Crew was helpful and friendly.

Lufthansa charged me $280 to take skiiis when in the US the boot bag and skiis are one check-in bag. This was not advertised and a real shock at the airport. They only took the boot bag as a check-in item. The seats have been squeezed together like any economy airline and legroom is not as good as it used to be. Otherwise, the flight was fine and staff was helpful for making my connection.

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

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