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Portugal

$256+ 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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LIS
Mar 11 — Mar 181
Wed 3/11
Wed 3/18
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 9, 2026.

This United Airlines deal was found by Cheapflights users on 2/9. 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.
Mon 11/21:45 pm
DEN
-
OPO
1 stop12h 45m
United Airlines
Thu 11/196:00 am
OPO
-
DEN
1 stop17h 00m
United Airlines
Deal found 2/9$488
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Tue 11/310:25 am
DEN
-
OPO
2 stops16h 05m
United Airlines
Fri 11/206:00 am
OPO
-
DEN
1 stop17h 00m
United Airlines
Deal found 2/9$493
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Wed 10/2111:30 am
ASE
-
LIS
2 stops13h 50m
United Airlines
Wed 11/45:00 am
LIS
-
ASE
2 stops20h 26m
United Airlines
Deal found 2/8$496
This American Airlines deal was found by Cheapflights users on 2/7. 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 4/712:22 pm
COS
-
LIS
2 stops19h 08m
American Airlines
Thu 4/168:25 am
LIS
-
COS
2 stops22h 07m
American Airlines
Deal found 2/7$497
This Expedia deal was found by Cheapflights users on 2/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/34:20 pm
DEN
-
OPO
1 stop13h 30m
Multiple Airlines
Tue 11/177:20 pm
OPO
-
DEN
2 stops31h 35m
Multiple Airlines
Deal found 2/9$497
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Mon 11/28:17 am
DEN
-
OPO
2 stops18h 13m
United Airlines
Fri 11/206:00 am
OPO
-
DEN
2 stops24h 03m
United Airlines
Deal found 2/9$503
This KAYAK deal was found by Cheapflights users on 2/9. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/15:45 pm
DEN
-
OPO
1 stop21h 40m
Lufthansa
Thu 11/196:00 am
OPO
-
DEN
1 stop17h 00m
Lufthansa
Deal found 2/9$504
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Tue 11/31:45 pm
DEN
-
OPO
1 stop12h 45m
United Airlines
Tue 11/1712:35 pm
OPO
-
DEN
1 stop15h 50m
United Airlines
Deal found 2/9$507
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Mon 11/28:17 am
DEN
-
OPO
2 stops18h 13m
United Airlines
Tue 11/1712:35 pm
OPO
-
DEN
2 stops17h 52m
United Airlines
Deal found 2/9$512
This KAYAK deal was found by Cheapflights users on 2/9. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/14:20 pm
DEN
-
OPO
2 stops23h 05m
Lufthansa
Fri 11/206:00 am
OPO
-
DEN
1 stop17h 00m
Lufthansa
Deal found 2/9$525
This United Airlines deal was found by Cheapflights users on 2/9. 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 11/51:45 pm
DEN
-
OPO
1 stop12h 45m
United Airlines
Fri 11/206:00 am
OPO
-
DEN
1 stop17h 00m
United Airlines
Deal found 2/9$538
This United Airlines deal was found by Cheapflights users on 2/8. 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 2/267:05 am
COS
-
LIS
2 stops18h 05m
United Airlines
Mon 3/26:10 am
LIS
-
COS
2 stops21h 54m
United Airlines
Deal found 2/8$545

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 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$497
(American Airlines)

One-way from

$256
(KLM)

Popular in

June

Cheapest in

January

Average price

$663
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. 17% potential increase in price ($192 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($36 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 9, 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

Tue 4/7

12:22 pm-2:30 pm

2 stops19h 08m

Lisbon Humberto Delgado

Thu 4/16

8:25 am-11:32 pm

2 stops22h 07m

$497

Colorado SpringsLisbon

COS - LIS

COSLIS

Colorado Springs

Thu 2/26

1:40 pm-10:15 am

2 stops13h 35m

Lisbon Humberto Delgado

Mon 3/2

6:10 am-9:04 pm

2 stops21h 54m

$545

DenverFaro

DEN - FAO

DENFAO

Denver Intl

Mon 3/9

12:51 pm-6:55 pm

2 stops24h 04m

Faro

Mon 3/16

7:15 pm-8:20 pm

2 stops31h 05m

$554

DenverFaro

DEN - FAO

DENFAO

Denver Intl

Tue 3/3

10:20 am-9:30 am

2 stops16h 10m

Faro

Tue 3/10

7:45 pm-7:36 pm

2 stops29h 51m

$554

AspenLisbon

ASE - LIS

ASELIS

Aspen Pitkin County

Thu 2/26

9:05 am-10:15 am

2 stops18h 10m

Lisbon Humberto Delgado

Mon 3/2

10:15 am-9:34 pm

2 stops18h 19m

$555

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 3/10

6:40 am-10:30 am

2 stops21h 50m

Porto

Wed 3/18

5:00 am-10:17 pm

2 stops23h 17m

$571

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Fri 2/27

11:15 am-8:10 am

1 stop13h 55m

Lisbon Humberto Delgado

Tue 3/3

5:00 am-1:40 pm

1 stop15h 40m

$605

DenverFunchal

DEN - FNC

DENFNC

Denver Intl

Wed 3/18

6:25 pm-11:20 am

1 stop34h 55m

Funchal Madeira

Wed 4/1

12:00 pm-4:30 pm

1 stop35h 30m

$609

DenverFunchal

DEN - FNC

DENFNC

Denver Intl

Tue 3/17

6:25 pm-11:10 am

1 stop34h 45m

Funchal Madeira

Wed 4/1

12:00 pm-4:30 pm

1 stop35h 30m

$609

DenverFunchal

DEN - FNC

DENFNC

Denver Intl

Wed 3/18

6:25 pm-11:20 am

1 stop34h 55m

Funchal Madeira

Tue 3/31

6:40 pm-4:30 pm

1 stop28h 50m

$609

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/7

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 $501). 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 13h 35m. American Airlines provides one of the quickest options available for as low as $545. Airlines will cover a distance of 4869 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 ($325), 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 $501). 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 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$458Average$668FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$514Average$1,119FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$555Average$880FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$559Average$1,070FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$574Average$692FlexibilityNo cancel feeOn-time77%
DeltaCheapest$575Average$961FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$595Average$868FlexibilityNo cancel feeOn-time67%
KLMCheapest$599Average$686FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$603Average$984FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$630Average$915FlexibilityNo cancel feeOn-time71%

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