DEN - BIO

$320 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 10/15. 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 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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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

Wed, Feb 4 - Wed, Feb 11
Multiple Airlines Logo
12:55 pm - 11:15 pmDEN-BIO
26h 20m2 stops
Multiple Airlines Logo
6:45 am - 6:02 pmBIO-DEN
19h 17m2 stops
$554Multiple Airlines
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Fri, Nov 28 - Mon, Dec 8
Multiple Airlines Logo
3:40 pm - 6:35 pmDEN-BIO
18h 55m2 stops
Multiple Airlines Logo
7:45 am - 6:05 pmBIO-DEN
18h 20m2 stops
$584Multiple Airlines
Find Deal
Wed, Nov 5 - Thu, Dec 4
United Airlines Logo
8:20 pm - 11:05 pmDEN-BIO
18h 45m1 stop
United Airlines Logo
6:45 am - 1:40 pmBIO-DEN
14h 55m1 stop
$591United Airlines
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Wed, Nov 5 - Thu, Dec 4
United Airlines Logo
7:46 am - 6:05 pmDEN-BIO
26h 19m2 stops
United Airlines Logo
6:45 am - 4:00 pmBIO-DEN
17h 15m1 stop
$596United Airlines
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Wed, Feb 4 - Wed, Feb 11
Multiple Airlines Logo
4:20 pm - 6:05 pmDEN-BIO
17h 45m1 stop
Multiple Airlines Logo
9:25 am - 7:55 pmBIO-DEN
18h 30m2 stops
$600Multiple Airlines
Find Deal
Wed, Feb 4 - Wed, Feb 11
Lufthansa Logo
4:20 pm - 6:05 pmDEN-BIO
17h 45m1 stop
Lufthansa Logo
11:35 am - 2:35 pmBIO-DEN
35h 00m1 stop
$605Lufthansa
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Wed, Nov 5 - Thu, Dec 4
United Airlines Logo
5:25 pm - 6:05 pmDEN-BIO
16h 40m2 stops
United Airlines Logo
12:50 pm - 12:15 amBIO-DEN
19h 25m2 stops
$606United Airlines
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Sat, Oct 4 - Tue, Nov 4
Iberia Logo
5:37 pm - 12:45 pmDEN-BIO
35h 08m2 stops
Iberia Logo
6:45 am - 10:22 pmBIO-DEN
23h 37m2 stops
$615Iberia
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Fri, Nov 28 - Mon, Dec 8
Lufthansa Logo
4:20 pm - 11:20 pmDEN-BIO
23h 00m1 stop
Lufthansa Logo
5:35 pm - 4:00 pmBIO-DEN
30h 25m1 stop
$661Lufthansa
Find Deal
Wed, Feb 4 - Wed, Feb 11
Air Canada Logo
11:15 am - 6:05 pmDEN-BIO
22h 50m2 stops
Air Canada Logo
12:50 pm - 12:33 pmBIO-DEN
31h 43m3 stops
$999Air Canada
Find Deal

Everything you should know

Top airlines
United Airlines
Cheapest • from $591 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$554
Multiple Airlines
Wed 2/4Wed 2/11
DEN - BIO • 2 stops
Cheapest one-way
$320
Multiple Airlines
Wed 10/15
DEN - BIO • 2 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Bilbao!
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’s the cheapest day of the week to fly from Denver to Bilbao?

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

If you are looking for a flight deal from Denver to Bilbao, look for departures on Wednesdays and avoid leaving on a Thursday, as it's usually the priciest day. When flying back from Bilbao, Sunday is the cheapest day to fly and Friday is the most expensive.

Good to know

Low seasonMarch
Cheapest flight$320
Best time to beat the crowds with an average 31% drop in price.
Most popular time to fly with an average 31% 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 $320 for a one-way ticket and $554 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, SkyTeam, and oneworld are the airline alliances operating flights between Denver and Bilbao, with Star Alliance being the most commonly used for this route.

  • 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 $965 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 $899 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 8924 reviews
7.3Comfort
7.7Boarding
8.1Crew
7.1Entertainment
6.6Food
Airline reviews

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

10.0 ExcellentAnonymous, Jun 2025DEN - BOS
Read more United Airlines reviews

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 😁

The seat and leg room was not good. The food and beverage service was good.

For economy, it was very good. Staff was great, they even let some of us change seats for more leg room... Put an empty seat between us which was fantastic for a 12hr flight. Onboard entertainment was excellent, I think over 200 choices of movies/tv/etc The bad was the barely/nonfunctional wifi that cost either $16.99 or 1700 miles (full flight). It was atrocious... Definitely the worst of the last 3 long haul major airlines I was on the last few months.

Electric plugs didn't work. Entertainment system wasn't working

The design of the light switch on the arm rest is ridiculous.

The gate attendant let me walk right by her with a bag too big for the overhead compartment

Overall, it was a good experience. Boarding was good and there was plenty of overhead bin space for everyone’s carryons (even when we boarded toward the end). Only improvement would be to offer trash service more regularly.

David went above and beyond to make our flight the best that it could be

No food service almost missed because of first flight delays

I liked Quiet people around me. Crew could have helped people with overhead luggage so they aren't moving other peoples bags around and causing problems for people that had there bags there first

The flight and crew were good. The customer experience on the ground could have been better. We had to reschedule our flight because of a delay on the previous flight. The attendants working the desk in Washington DC were not helpful. They told us to scan a QR code and that would get us rebooked. Why couldn't two people standing at their computers do this? We had to chat with someone to get everything figured out. It was extremely confusing.

The plane was delayed by two hours in Chicago which led to us missing the next flight. Lufthansa rebooked the flight and booked us a hotel for the night in Frankfurt. The level of customer service and getting us taken care of was superb. The flight crew and the service on the ground was superb.

It was a short flight, everything was good with it.

Flight was delayed over one hour and I had to pay to select my seat, even though my booking supposedly had free selection (I paid extra for this at time of booking)

Stop charging for alcohol overseas flights and start taking cash again not everyone wants to pay with card if the person is bigger give him seat on the outside seats not the middle in between the people is common sense and mainly if you fly for Lufthansa provides the sam service and experience...

good entertainment package but rather small seats for business class

The male attendant has zero personality. It seemed like he was over worked or hated his job, not once did he smile or made any contact with the people on the plane. Strictly business and call it a day!

Booked Economy but it translated to economy light for Lufthansa so now we are stuck paying an extra $75 per person both ways for our checked bags. If I had known that, I would have never booked these tickets because it came out to be more than other options. The booking in the kayak side clearly says Economy and has a link to the inormation for Lufthansa which states Economy included a checked bag. Super annoyed about that.

The flight from Dulles to Munich was just okay. The seats were comfortable and extra foot room was noticeable in comfort plus. Disappointed in the booking in so much I requested an aisle seat and then was assigned a middle seat. The food was inedible. Movie choices were moderate. I usually fly Delta, but this WA flight was cheaper. Next time, I'll happily pay the extra to fly Delta.

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

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