$525 Cheap Flights from Basel (BSL) to Denver (DEN)

View $525 flight on Thu, Sep 3, 2026Opens in a new window

Popular airlines from EuroAirport Airport (BSL) to Denver Intl. Airport (DEN)

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Cheap Flights from Basel to Denver (BSL-DEN)

Prices were available within the past 7 days and start at $525 for one-way flights and $932 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Lufthansa
Thu, Jun 25 - Wed, Jul 1
BSL
Basel
DEN
Denver
$932 Roundtrip, found 5 days ago
$932
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Thu, Jun 25 from Basel to Denver, returning Wed, Jul 1, priced at $932 found 5 days ago
Lufthansa
Thu, Jun 25 - Wed, Jul 1
BSL
Basel
DEN
Denver
$943 Roundtrip, found 5 days ago
$943
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Thu, Jun 25 from Basel to Denver, returning Wed, Jul 1, priced at $943 found 5 days ago
Lufthansa
Thu, Jun 25 - Wed, Jul 1
BSL
Basel
DEN
Denver
$972 Roundtrip, found 5 days ago
$972
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Thu, Jun 25 from Basel to Denver, returning Wed, Jul 1, priced at $972 found 5 days ago
Lufthansa
Thu, Jun 25 - Wed, Jul 1
BSL
Basel
DEN
Denver
$973 Roundtrip, found 5 days ago
$973
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Thu, Jun 25 from Basel to Denver, returning Wed, Jul 1, priced at $973 found 5 days ago
Lufthansa
Thu, Jun 25 - Wed, Jul 1
BSL
Basel
DEN
Denver
$983 Roundtrip, found 5 days ago
$983
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Thu, Jun 25 from Basel to Denver, returning Wed, Jul 1, priced at $983 found 5 days ago
Lufthansa
Thu, Jun 25 - Wed, Jul 1
BSL
Basel
DEN
Denver
$988 Roundtrip, found 5 days ago
$988
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Thu, Jun 25 from Basel to Denver, returning Wed, Jul 1, priced at $988 found 5 days ago
Lufthansa
Thu, Jun 25 - Wed, Jul 1
BSL
Basel
DEN
Denver
$995 Roundtrip, found 5 days ago
$995
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Thu, Jun 25 from Basel to Denver, returning Wed, Jul 1, priced at $995 found 5 days ago
Air Canada
Thu, Jun 25 - Wed, Jul 1
BSL
Basel
DEN
Denver
$1,054 Roundtrip, found 5 days ago
$1,054
Roundtrip
found 5 days ago
Select Air Canada flight, departing Thu, Jun 25 from Basel to Denver, returning Wed, Jul 1, priced at $1,054 found 5 days ago
Austrian Airlines
Thu, Jun 25 - Wed, Jul 1
BSL
Basel
DEN
Denver
$1,073 Roundtrip, found 5 days ago
$1,073
Roundtrip
found 5 days ago
Select Austrian Airlines flight, departing Thu, Jun 25 from Basel to Denver, returning Wed, Jul 1, priced at $1,073 found 5 days ago
British Airways
Sat, Aug 8 - Wed, Aug 19
BSL
Basel
DEN
Denver
$1,145 Roundtrip, found 2 days ago
$1,145
Roundtrip
found 2 days ago
Select British Airways flight, departing Sat, Aug 8 from Basel to Denver, returning Wed, Aug 19, priced at $1,145 found 2 days ago

Frequently asked questions

How much does a flight from Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.) cost?
You can find cheap one-way flights from $525 and cheap return flights from $932 Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.) with Expedia. One-way flights generally range between $582 and $3856, and roundtrip flights usually range from $809 to $3253. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.)?
The cheapest month to fly from BSL to DEN is June when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.)?
Enter BSL to DEN and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.)?
KLM is one of the cheapest airlines offering connecting flights from Basel (BSL) to Denver (DEN), with round-trip tickets starting from around $826. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.)?
To find a cheap flight from Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.)?
The earliest flight from Basel (BSL) to Denver (DEN) generally departs at around 5:15 AM, operated by Lufthansa. This seasonal service runs in April and December, allowing you to make the most of your day upon arrival in Denver. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.)?
The most popular departure times for flights from Basel (BSL) to Denver, CO (DEN) are in the early morning, from 6am to 9am. About 52% of passengers prefer this time window. Many major carriers, including KLM and British Airways, offer flights during this window. This timing is favored as it helps you arrive in Denver ready to start your day.
How long does it take to fly from Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.)?
Flights from BSL to DEN with one stop typically take around 17 hours 20 minutes, covering approximately 5,105 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.)?
Business class is available on flights from BSL to DEN. Airlines that offer business class service on this route include:

  • British Airways
  • Lufthansa
  • Air Dolomiti
  • Turkish Airlines
  • Swiss International Air Lines
  • Austrian Airlines
  • Air France

How do I earn miles on a Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.) flight with Expedia?
It's easy to earn miles on a Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Denver from EuroAirport Basel (BSL)?
If you're planning to travel to Denver from EuroAirport Basel (BSL), you can fly into Denver Intl. (DEN) Some flights may connect through major hubs like Schiphol (AMS), Roissy-Charles de Gaulle (CDG), Frankfurt Intl. (FRA) before reaching Denver. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.) at the last minute?
Typically, booking a last minute flight from Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.) flight and hotel package?
Securing a Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.) Denver Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.)?
If you booked your Basel (BSL-EuroAirport) to Denver, CO (DEN-Denver Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
EuroAirport
Destination airport
Denver Intl.
Roundtrip price
$932
Distance
5104 mi

Book with confidence

Basel to Denver Flights

The cheapest times to fly from Basel to Denver

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Basel to Denver are during the month of June. You can find some of the cheapest flights from Basel to Denver with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Basel to Denver

Sunday is one of the best days to book for cheap flights from Basel to Denver: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Basel to Denver

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Basel to Denver in 2026. You can also book with separate airlines for your outbound and return journeys, from $525 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Basel to Denver flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Basel to Denver airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Basel to Denver Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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