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Portugal

$249+ Cheap flights from Colorado to Portugal

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/30. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LIS
Mar 25 — Apr 11
Wed 3/25
Wed 4/1
1 adult, Economy
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Cheap flight deals from Colorado to Portugal

Cheapest flights from Colorado to Portugal
Explore the most affordable flight options available from Colorado to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 23, 2026.

This American Airlines deal was found by Cheapflights users on 2/23. 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.
Mon 4/275:13 pm
COS
-
LIS
2 stops17h 42m
American Airlines
Thu 5/78:25 am
LIS
-
COS
2 stops22h 07m
American Airlines
Deal found 2/23$497
This United Airlines deal was found by Cheapflights users on 2/23. 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.
Sat 4/251:33 pm
COS
-
LIS
2 stops19h 07m
United Airlines
Tue 5/51:00 pm
LIS
-
COS
2 stops28h 47m
United Airlines
Deal found 2/23$513
This United Airlines deal was found by Cheapflights users on 2/23. 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.
Sat 4/251:33 pm
COS
-
LIS
2 stops19h 07m
United Airlines
Thu 5/712:20 pm
LIS
-
COS
2 stops27h 27m
United Airlines
Deal found 2/23$532
This KLM deal was found by Cheapflights users on 2/22. 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 3/1612:51 pm
DEN
-
FAO
2 stops24h 04m
KLM
Mon 3/309:45 pm
FAO
-
DEN
2 stops26h 22m
KLM
Deal found 2/22$545
This Air France deal was found by Cheapflights users on 2/23. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2711:55 am
COS
-
LIS
2 stops20h 00m
Multiple Airlines
Wed 5/67:45 pm
LIS
-
COS
2 stops32h 42m
Multiple Airlines
Deal found 2/23$551
This KLM deal was found by Cheapflights users on 2/20. 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.
Tue 3/311:33 am
DEN
-
FAO
2 stops23h 32m
KLM
Tue 3/107:45 pm
FAO
-
DEN
2 stops29h 51m
KLM
Deal found 2/20$554
This United Airlines deal was found by Cheapflights users on 2/22. 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.
Thu 2/261:40 pm
COS
-
LIS
2 stops13h 35m
United Airlines
Mon 3/210:15 am
LIS
-
COS
2 stops18h 29m
United Airlines
Deal found 2/22$555
This United Airlines deal was found by Cheapflights users on 2/22. 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.
Thu 2/2611:05 am
ASE
-
LIS
2 stops16h 10m
United Airlines
Mon 3/211:55 am
LIS
-
ASE
2 stops28h 08m
United Airlines
Deal found 2/22$555
This FlightHub deal was found by Cheapflights users on 2/22. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/254:20 pm
DEN
-
OPO
1 stop13h 30m
Lufthansa
Mon 11/301:45 pm
OPO
-
DEN
1 stop31h 50m
Lufthansa
Deal found 2/22$558
This Delta deal was found by Cheapflights users on 2/23. 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.
Mon 4/2711:55 am
COS
-
LIS
2 stops20h 00m
Delta
Sat 5/95:35 am
LIS
-
COS
2 stops22h 52m
Delta
Deal found 2/23$559
This Travelocity deal was found by Cheapflights users on 2/22. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2511:15 am
DEN
-
OPO
2 stops18h 35m
Multiple Airlines
Mon 11/301:45 pm
OPO
-
DEN
1 stop31h 50m
Multiple Airlines
Deal found 2/22$563
This Delta deal was found by Cheapflights users on 2/23. 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.
Mon 4/277:59 am
COS
-
LIS
2 stops23h 56m
Delta
Mon 5/410:00 am
LIS
-
COS
2 stops32h 12m
Delta
Deal found 2/23$566

Find flight deals from Colorado to Portugal

Keep the following information in mind while searching for Colorado to Portugal flight deals. Data was last updated February 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$545
(KLM)

One-way from

$249
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$630
Provider with most accurate pricing for Denver Intl-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Lisbon Humberto Delgado flights.
Search Deals
From Colorado to Portugal
Search Deals
One-way flight from Colorado to Portugal
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($196 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado to Portugal 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 February 23, 2026.
Use the filters below to find and compare flights from Colorado to Portugal that are best for you.

Fly from

Colorado

Fly to

Portugal

Route

Depart

Return

Price

Colorado SpringsLisbon

COS - LIS

COSLIS

Colorado Springs

Sun 4/26

1:33 pm-3:30 pm

2 stops18h 57m

Lisbon Humberto Delgado

Tue 5/5

1:00 pm-10:47 am

2 stops28h 47m

$513

Colorado SpringsLisbon

COS - LIS

COSLIS

Colorado Springs

Sun 4/26

1:33 pm-3:30 pm

2 stops18h 57m

Lisbon Humberto Delgado

Thu 5/7

12:20 pm-8:47 am

2 stops27h 27m

$532

DenverFaro

DEN - FAO

DENFAO

Denver Intl

Mon 3/16

12:51 pm-6:55 pm

2 stops24h 04m

Faro

Mon 3/30

9:45 pm-5:07 pm

2 stops26h 22m

$545

DenverFaro

DEN - FAO

DENFAO

Denver Intl

Tue 3/3

3:07 pm-6:05 pm

2 stops19h 58m

Faro

Tue 3/10

7:45 pm-8:20 pm

2 stops30h 35m

$554

Colorado SpringsLisbon

COS - LIS

COSLIS

Colorado Springs

Mon 4/27

11:55 am-2:55 pm

2 stops20h 00m

Lisbon Humberto Delgado

Sat 5/9

5:35 am-9:27 pm

2 stops22h 52m

$559

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sun 4/26

6:00 am-10:30 am

1 stop21h 30m

Lisbon Humberto Delgado

Wed 5/6

10:25 am-6:05 pm

1 stop14h 40m

$577

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 4/14

12:44 pm-2:55 pm

2 stops19h 11m

Lisbon Humberto Delgado

Fri 4/24

10:00 am-7:42 pm

1 stop16h 42m

$581

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 4/28

5:10 pm-8:00 pm

2 stops19h 50m

Porto

Tue 5/5

8:40 pm-10:40 pm

2 stops33h 00m

$583

Colorado SpringsLisbon

COS - LIS

COSLIS

Colorado Springs

Tue 4/28

6:15 am-8:00 am

2 stops18h 45m

Lisbon Humberto Delgado

Tue 5/5

5:35 am-8:20 pm

2 stops21h 45m

$609

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 3/31

12:30 pm-2:55 pm

2 stops19h 25m

Lisbon Humberto Delgado

Tue 4/21

5:00 am-6:10 pm

2 stops20h 10m

$616

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/21

Showing 1-10 of 60 results
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Best time to book a flight from Colorado to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from Colorado 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 Colorado to Portugal

What is the cheapest month to book a flight from Colorado to Portugal?

Currently, November is the cheapest month in which you can book a flight from Colorado to Portugal (average of $503). Flying from Colorado to Portugal in June is currently the most expensive (average of $857). 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.

Related info for your journey

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

  • How long is the flight from Colorado to Portugal?

    A quick flight from Colorado to Portugal can take about 19h 11m. KLM provides one of the quickest options available for as low as $581. Airlines will cover a distance of 4826 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Colorado to Portugal one-way?

    The cheapest airlines for a one-way flight from Colorado to Portugal are Icelandair ($242), British Airways ($326), and Air France ($333).

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Colorado to Portugal 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 Colorado to Portugal?

    Currently, November is the cheapest month in which you can book a flight from Colorado to Portugal (average of $503). Flying from Colorado to Portugal in June is currently the most expensive (average of $857). 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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Alternative routes for Colorado to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Colorado to Portugal

Discover the top 10 airlines that operate flights from Colorado to Portugal. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$458Average$668FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$514Average$1,104FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$555Average$881FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$559Average$1,076FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$574Average$700FlexibilityNo cancel feeOn-time77%
DeltaCheapest$575Average$968FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$595Average$866FlexibilityNo cancel feeOn-time67%
KLMCheapest$599Average$686FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$603Average$984FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$630Average$917FlexibilityNo cancel feeOn-time71%

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