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$571+ Cheap flights from Basel EuroAirport Swiss (BSL) to Colorado

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
BSL — DEN
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
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Cheap flight deals from Basel to Colorado

Keep the following information in mind while searching for Basel to Colorado flight deals. Data was last updated May 1, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$571
(American Airlines)

Popular in

September

Cheapest in

February

Average price

$791
Provider with most accurate pricing for Basel (EAP)-Denver Intl flight deals.
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Provider most trusted by Cheapflights users for Basel (EAP)-Denver Intl flights.
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From Basel EuroAirport Swiss to Colorado
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Highest demand for flights based on searches. 6% potential increase in price ($50 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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Find flight deals from Basel to Colorado

Cheapest flights from Basel to Colorado
Explore the most affordable flight options available from Basel to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 1, 2025.

This American Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/36:40 amBSL - DEN
1 stop17h 45mAmerican Airlines
Mon 9/226:35 pmDEN - BSL
1 stop15h 45mAmerican Airlines
Deal found 4/30$571
This British Airways deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/56:00 amBSL - DEN
1 stop18h 25mBritish Airways
Fri 9/196:35 pmDEN - BSL
1 stop20h 15mBritish Airways
Deal found 4/30$573
This British Airways deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/56:00 amBSL - COS
2 stops25h 25mBritish Airways
Fri 9/192:44 pmCOS - BSL
2 stops24h 06mBritish Airways
Deal found 4/30$578
This Delta deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/66:15 amBSL - DEN
2 stops17h 15mDelta
Sat 9/204:00 pmDEN - BSL
2 stops17h 50mDelta
Deal found 4/30$676
This Delta deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/66:15 amBSL - COS
2 stops22h 45mDelta
Sat 9/201:40 pmCOS - BSL
2 stops20h 10mDelta
Deal found 4/30$681
This American Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/1011:10 amBSL - DEN
1 stop13h 15mMultiple Airlines
Wed 7/26:35 pmDEN - BSL
1 stop16h 25mMultiple Airlines
Deal found 4/30$708
This Lufthansa deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/179:45 amBSL - DEN
1 stop16h 50mLufthansa
Tue 6/248:25 pmDEN - BSL
1 stop15h 10mLufthansa
Deal found 4/30$741
This United Airlines deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/1511:30 amBSL - DEN
2 stops20h 11mUnited Airlines
Sun 6/224:15 pmDEN - BSL
1 stop19h 20mUnited Airlines
Deal found 5/1$753
This Flysmarter deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/58:25 amBSL - COS
3 stops23h 25mMultiple Airlines
Fri 9/193:45 pmCOS - BSL
2 stops14h 00mMultiple Airlines
Deal found 4/30$781
This KLM deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/166:15 amBSL - DEN
2 stops17h 19mKLM
Fri 6/275:40 pmDEN - BSL
2 stops16h 10mKLM
Deal found 4/30$1,052
This Austrian Airlines deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/158:25 pmBSL - DEN
2 stops29h 47mAustrian Airlines
Sun 6/228:25 pmDEN - BSL
2 stops29h 15mAustrian Airlines
Deal found 5/1$1,098
This Air Canada deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/58:25 amBSL - COS
3 stops21h 29mAir Canada
Fri 9/199:30 amCOS - BSL
3 stops17h 25mAir Canada
Deal found 4/30$1,272

Cheapflights Fare Finder

Customize your flight search to find flights from Basel to Colorado that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 1, 2025.
Use the filters below to find and compare flights from Basel EuroAirport Swiss to Colorado that are best for you.

Fly from

Basel

Fly to

Colorado

Route

Depart

Return

Price

BaselDenver

BSL - DEN

BSLDEN

Basel EuroAirport Swiss

Wed 9/3

6:40 am-4:25 pm

1 stop17h 45m

Denver Intl

Mon 9/22

6:35 pm-6:20 pm

1 stop15h 45m

$571

BaselDenver

BSL - DEN

BSLDEN

Basel EuroAirport Swiss

Fri 9/5

6:00 am-4:25 pm

1 stop18h 25m

Denver Intl

Fri 9/19

6:35 pm-10:50 pm

1 stop20h 15m

$573

BaselColorado Springs

BSL - COS

BSLCOS

Basel EuroAirport Swiss

Fri 9/5

6:00 am-11:25 pm

2 stops25h 25m

Colorado Springs

Fri 9/19

2:44 pm-10:50 pm

2 stops24h 06m

$578

BaselDenver

BSL - DEN

BSLDEN

Basel EuroAirport Swiss

Sat 9/6

6:15 am-3:30 pm

2 stops17h 15m

Denver Intl

Sat 9/20

4:00 pm-5:50 pm

2 stops17h 50m

$676

BaselColorado Springs

BSL - COS

BSLCOS

Basel EuroAirport Swiss

Sat 9/6

6:15 am-9:00 pm

2 stops22h 45m

Colorado Springs

Sat 9/20

1:40 pm-5:50 pm

2 stops20h 10m

$681

BaselDenver

BSL - DEN

BSLDEN

Basel EuroAirport Swiss

Tue 6/10

11:10 am-4:25 pm

1 stop13h 15m

Denver Intl

Wed 7/2

6:35 pm-7:00 pm

1 stop16h 25m

$708

BaselDenver

BSL - DEN

BSLDEN

Basel EuroAirport Swiss

Tue 6/17

9:45 am-6:35 pm

1 stop16h 50m

Denver Intl

Tue 6/24

8:25 pm-7:35 pm

1 stop15h 10m

$741

BaselDenver

BSL - DEN

BSLDEN

Basel EuroAirport Swiss

Sun 6/15

11:30 am-11:41 pm

2 stops20h 11m

Denver Intl

Sun 6/22

4:15 pm-7:35 pm

1 stop19h 20m

$753

BaselColorado Springs

BSL - COS

BSLCOS

Basel EuroAirport Swiss

Fri 9/5

8:25 am-11:50 pm

3 stops23h 25m

Colorado Springs

Fri 9/19

3:45 pm-1:45 pm

2 stops14h 00m

$781

BaselDenver

BSL - DEN

BSLDEN

Basel EuroAirport Swiss

Mon 6/16

6:15 am-3:34 pm

2 stops17h 19m

Denver Intl

Fri 6/27

5:40 pm-5:50 pm

2 stops16h 10m

$1,052

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 17 results
1
2

Best time to book a flight from Basel to Colorado

Have a flexible travel schedule? Discover the best time to fly to Colorado from Basel with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Basel EuroAirport Swiss to Colorado

Rainfall in Colorado by month

Plan your trip to Colorado by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Colorado ranges from 0.5 - 2.3 inches per month. May is typically the wettest month, when rainfall can reach 2.3 in. January is typically the driest time to visit Colorado when rainfall is around 0.5 in.

Temperature in Colorado by month

Plan your trip to Colorado by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Colorado, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Colorado

Get insights into the airlines that provide service to Colorado. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Colorado. Reviews last updated May 1, 2025.
See what other customers who have flown with Delta, KLM and Austrian Airlines from Basel to Colorado have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,934 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,334 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Austrian Airlines
7.6
Good
781 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Basel to Colorado. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Basel to Colorado?

    If you book a flight to Colorado from Basel, you will be flying from EuroAirport Swiss, which is the city’s only airport. Basel EuroAirport Swiss (BSL) is located 3.6 mi from the center of Basel.

  • Can I find deals for flights from Basel to Colorado that include hotel bookings?

    Yes. In addition to deals on Basel to Colorado flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Basel to Colorado?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Basel to Colorado.

  • Can I find deals for business class flights from Basel to Colorado?

    Yes. Cheapflights offers flight deals from Basel to Colorado by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Basel EuroAirport Swiss to Colorado?

    Currently, October is the cheapest month in which you can book a flight from Basel EuroAirport Swiss to Colorado (average of $197). Flying from Basel EuroAirport Swiss to Colorado in March is currently the most expensive (average of $278). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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