DEN - BIO

$434 Find Cheap Flights from Denver 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 Denver to Bilbao departing on 6/20. 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 Denver 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 Denver to Bilbao, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$542
Overall average: $573
Multiple Airlines
Tue 2/24Tue 3/3
DEN - BIO • 2 stops
Cheapest one-way
$433
Lufthansa
Sat 6/20
DEN - BIO • 2 stops
Top airlines
Lufthansa
Cheapest • from $548 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
February
Cheapest • 38% price drop
December
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 Denver to Bilbao (DEN-BIO)

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

Tue, Feb 24 - Tue, Mar 3
Multiple Airlines Logo
11:15 am - 12:50 pm
DEN
-
BIO
17h 35m
2 stops
Multiple Airlines Logo
6:45 am - 4:00 pm
BIO
-
DEN
17h 15m
1 stop
$542Multiple Airlines
Tue, Feb 24 - Tue, Mar 3
Lufthansa Logo
4:15 pm - 9:55 pm
DEN
-
BIO
21h 40m
2 stops
Lufthansa Logo
6:45 am - 4:00 pm
BIO
-
DEN
17h 15m
1 stop
$548Lufthansa
Tue, Feb 24 - Tue, Mar 3
Multiple Airlines Logo
11:15 am - 12:05 pm
DEN
-
BIO
16h 50m
2 stops
Multiple Airlines Logo
6:45 am - 10:23 am
BIO
-
DEN
35h 38m
2 stops
$549Multiple Airlines
Mon, Feb 23 - Tue, Mar 10
Multiple Airlines Logo
11:15 am - 12:50 pm
DEN
-
BIO
17h 35m
2 stops
Multiple Airlines Logo
6:45 am - 5:00 pm
BIO
-
DEN
17h 15m
1 stop
$551Multiple Airlines
Tue, Feb 24 - Tue, Mar 3
Lufthansa Logo
5:45 pm - 4:40 pm
DEN
-
BIO
14h 55m
1 stop
Lufthansa Logo
6:45 am - 4:00 pm
BIO
-
DEN
17h 15m
1 stop
$555Lufthansa
Tue, Feb 24 - Tue, Mar 3
Multiple Airlines Logo
11:15 am - 12:05 pm
DEN
-
BIO
16h 50m
2 stops
Multiple Airlines Logo
6:45 am - 4:40 pm
BIO
-
DEN
17h 55m
2 stops
$557Multiple Airlines
Mon, Feb 23 - Tue, Mar 10
United Airlines Logo
8:20 pm - 11:05 pm
DEN
-
BIO
18h 45m
1 stop
United Airlines Logo
6:45 am - 5:00 pm
BIO
-
DEN
17h 15m
1 stop
$571United Airlines
Mon, Feb 23 - Tue, Mar 10
Delta Logo
6:10 am - 5:20 pm
DEN
-
BIO
27h 10m
2 stops
Delta Logo
6:50 am - 8:20 pm
BIO
-
DEN
20h 30m
2 stops
$575Delta
Thu, Mar 5 - Tue, Mar 17
Lufthansa Logo
5:45 pm - 10:50 pm
DEN
-
BIO
21h 05m
1 stop
Lufthansa Logo
6:45 am - 5:00 pm
BIO
-
DEN
17h 15m
1 stop
$601Lufthansa
Thu, Mar 5 - Tue, Mar 17
United Airlines Logo
7:46 am - 10:50 am
DEN
-
BIO
19h 04m
2 stops
United Airlines Logo
6:45 am - 5:00 pm
BIO
-
DEN
17h 15m
1 stop
$623United Airlines
Booking Insights

KAYAK's insights & trends for Denver to Bilbao flights

Get data-powered insights and trends into flights from Denver 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 Denver to Bilbao?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Denver 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 Denver to Bilbao is February, where tickets cost $573 (return) on average. On the other hand, the most expensive months are May and December, where the average cost of round-trip tickets is $1,440 and $1,380 respectively.

Good to know

Low seasonJanuary
Cheapest flight$433
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly with an average 48% increase in price.
Flight from Denver to Bilbao

When to book flights from Denver to Bilbao

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

  • What is the cheapest flight from Denver to Bilbao?

    In the last 3 days, the lowest price for a flight from Denver to Bilbao was $434 for a one-way ticket and $542 for a round-trip.

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

    A passport is required to fly from Denver to Bilbao.

  • Which airports will I be using when flying from Denver to Bilbao?

    Denver and Bilbao are both served by 1 main airport. You will leave Denver from Denver Intl and will be arriving at Bilbao.

  • Which aircraft models fly most regularly from Denver to Bilbao?

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

  • Which airline alliances offer flights from Denver to Bilbao?

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

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

    The two airlines most popular with KAYAK users for flights from Denver to Bilbao are United Airlines and Lufthansa. With an average price for the route of $942 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 $877 and an overall rating of 6.8.

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

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Bilbao from Denver 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 Denver 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 Denver with another airline. Booking your flights between Denver 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 Denver 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 Denver 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 Denver to Bilbao

 
See real verified KAYAK customer reviews for airlines flying from Denver 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 Denver 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 9213 reviews
6.6Food
7.1Entertainment
7.3Comfort
7.7Boarding
8.1Crew
Airline reviews

Sitting on the runway after we land for almost two hours! Not sure if we should blame United or Just Dumpy Vance.

2.0 MediocreSid, Dec 2025
DEN - BZN
Read more United Airlines reviews

Sitting on the runway after we land for almost two hours! Not sure if we should blame United or Just Dumpy Vance.

Flight was late - I was downgraded from first class to coach

United overall experience is great these days. Airport experience was very organized. Staff on flight were great. App and information as good as it gets.

Great smooth flight. Had a seating change, but that was an improvement. Thanks United Airways Crew.

Flight was good but there are way to many announcements for credit cards etc.

Crew seemed a bit cranky. No seatback screens. But boarding was efficient and on time and we arrived early.

See previous note about the passenger in Denver who threw my husband's bag out of the overhead bin in order to maker room for his own. And the flight attendant back up the new passenger.

Terrible. They wouldn't allow me on my flight on the 14th..

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

Missed it by a couple minutes and couldn’t find an alternative flight so had to spend the night in DC and after much shuffling from 1 airline to another managed to get a United to Frankfurt.

There were only 2 toilets and one of them did not work in business class. We are not allowed to cross classes so had to wait in line to use the toilets!! The entertainment touch display was finicky and did not work all the time.

We missed our flight. There was not enough time built into the layover to get through immigration, customs, bagclaim, bag rechecking, and the long trip to another terminal and gate. Kayak really screwed up. We took the bus up to Wisconsin and then were picked up in Brookfield by private car. It was lucky we didnt miss the last bus out.

I tried both on line and by calling the Customer Service line to arrange for a special meal as i have food intolerances. I was under the impression from your service representative that I was successful. I was not. I cannot eat spicy foods and get very ill if i eat bell peppers. I could not eat either menu choice and no special meal was actually ordered. ( your representative tried to order it for a flight that did not have meal service!!! - found this out later). Your wonderful cabin crew managed to put together a fruit, salad, roll and cheese tray for me so I had something to eat. WHY WOULD YOU SERVE SPICY FOOD, WITH NO MILDER OPTION,ON AN INTERNATIONAL FLIGHT???

Crew was professional and great, flight was clean. However food was pathetic. I ordered a Hindu meal assuming no meat but they served chicken. Need to be very specific- Hindu meal should be categorize as Vegetarian - no meat or egg. Or it should be specific that we are serving meat.

Late flight Delays Poor service Poor staff Worst airline ever

Ground staff and cabin crew were excellent. Flight was perfectly on time. Zero issues.

Even after a delay, getting off the ground, thanks for keeping me safe, the airline made certain that my connecting flight was rebooked to get me to my final destination. It was actually rebooked twice, and my luggage still managed to meet me. The airline gave me a credit for food and beverage to be used at the airport vendors, regretfully, the credit did not transfer to my final boarding pass. Oh, well…

Trip was smooth, good drew, average meal, almost cold coffee. Excellent landing. Did not enjoy going down the stairs, walking to the gate, walking up the stairs, going a long walk to the exchange gate, and going down the stairs again to be bussed all the way where we originally landed to take our next flight! Over all an average experience. Thank you.

I booked extra leg room, due to seat neighbor i now consider extra shoulder and arm room as well. Seems like the seats shrink in width now The crew was very friendly and professional ( 100%). Food was good not great, breakfast was bad, a dry slice of bread would have been better. Facilities clean.

Everything you need to know for your flight from Denver to Bilbao

Information on your arrival and departure airports