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Portugal

$225+ 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 4/26. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LIS
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
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 January 28, 2026.

This Mytrip deal was found by Cheapflights users on 1/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/274:05 pm
DEN
-
OPO
1 stop24h 20m
Multiple Airlines
Wed 5/66:20 am
OPO
-
DEN
2 stops21h 08m
Multiple Airlines
Deal found 1/27$480
This FlightHub deal was found by Cheapflights users on 1/27. 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.
Mon 4/274:05 pm
DEN
-
OPO
1 stop24h 20m
Lufthansa
Wed 5/66:00 am
OPO
-
DEN
1 stop16h 40m
Lufthansa
Deal found 1/27$490
This Booking.com deal was found by Cheapflights users on 1/26. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/112:50 pm
COS
-
LIS
2 stops37h 30m
Multiple Airlines
Sat 11/146:10 am
LIS
-
COS
2 stops18h 19m
Multiple Airlines
Deal found 1/26$496
This United Airlines deal was found by Cheapflights users on 1/27. 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 4/277:45 am
DEN
-
OPO
2 stops19h 00m
United Airlines
Wed 5/66:00 am
OPO
-
DEN
1 stop16h 40m
United Airlines
Deal found 1/27$499
This United Airlines deal was found by Cheapflights users on 1/27. 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 2/267:00 am
ASE
-
LIS
2 stops20h 15m
United Airlines
Mon 3/211:55 am
LIS
-
ASE
2 stops31h 50m
United Airlines
Deal found 1/27$513
This British Airways deal was found by Cheapflights users on 1/27. 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.
Mon 4/276:30 pm
DEN
-
OPO
2 stops18h 20m
British Airways
Wed 5/68:20 am
OPO
-
DEN
2 stops21h 20m
British Airways
Deal found 1/27$515
This Lufthansa deal was found by Cheapflights users on 1/27. 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.
Mon 4/274:05 pm
DEN
-
OPO
1 stop24h 20m
Lufthansa
Tue 5/56:20 am
OPO
-
DEN
1 stop15h 00m
Lufthansa
Deal found 1/27$520
This Iberia deal was found by Cheapflights users on 1/27. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2910:36 am
DEN
-
OPO
2 stops18h 09m
Iberia
Wed 5/68:20 am
OPO
-
DEN
2 stops22h 39m
Iberia
Deal found 1/27$522
This Iberia deal was found by Cheapflights users on 1/27. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/282:39 pm
DEN
-
OPO
2 stops18h 21m
Iberia
Tue 5/58:40 pm
OPO
-
DEN
2 stops32h 21m
Iberia
Deal found 1/27$533
This Kiwi.com deal was found by Cheapflights users on 1/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/235:45 pm
DEN
-
OPO
1 stop14h 10m
Multiple Airlines
Mon 3/27:20 pm
OPO
-
DEN
2 stops34h 46m
Multiple Airlines
Deal found 1/25$536
This Mytrip deal was found by Cheapflights users on 1/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/211:15 am
DEN
-
OPO
2 stops17h 50m
Multiple Airlines
Tue 3/176:00 am
OPO
-
DEN
1 stop17h 00m
Multiple Airlines
Deal found 1/26$537
This Kiwi.com deal was found by Cheapflights users on 1/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/235:45 pm
DEN
-
OPO
1 stop14h 10m
Lufthansa
Mon 3/212:30 pm
OPO
-
DEN
1 stop34h 30m
Lufthansa
Deal found 1/25$542

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 January 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$480
(Mytrip)

One-way from

$225
(British Airways)

Popular in

June

Cheapest in

November

Average price

$710
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 ($195 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 January 28, 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

AspenLisbon

ASE - LIS

ASELIS

Aspen Pitkin County

Thu 2/26

7:00 am-10:15 am

2 stops20h 15m

Lisbon Humberto Delgado

Mon 3/2

11:55 am-12:45 pm

2 stops31h 50m

$513

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 3/2

7:50 am-9:30 am

1 stop18h 40m

Porto

Tue 3/17

6:00 am-5:00 pm

1 stop17h 00m

$550

DenverFaro

DEN - FAO

DENFAO

Denver Intl

Tue 3/3

6:00 am-9:30 am

2 stops20h 30m

Faro

Tue 3/10

7:45 pm-7:51 pm

2 stops30h 06m

$554

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Mon 4/27

12:34 pm-8:20 am

1 stop12h 46m

Lisbon Humberto Delgado

Wed 5/6

5:05 am-11:30 pm

2 stops25h 25m

$564

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sun 4/26

6:40 am-8:00 am

1 stop18h 20m

Lisbon Humberto Delgado

Wed 5/6

5:00 am-10:49 pm

2 stops24h 49m

$566

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 2/24

9:36 am-8:10 am

2 stops15h 34m

Lisbon Humberto Delgado

Tue 3/3

5:00 am-6:08 pm

2 stops20h 08m

$569

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Wed 2/25

10:50 am-8:00 am

2 stops14h 10m

Lisbon Humberto Delgado

Wed 3/4

5:00 am-4:39 pm

2 stops18h 39m

$572

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 4/28

6:40 pm-3:35 pm

1 stop13h 55m

Lisbon Humberto Delgado

Mon 5/4

6:45 pm-4:30 pm

1 stop28h 45m

$579

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Mon 4/27

12:34 pm-8:20 am

1 stop12h 46m

Lisbon Humberto Delgado

Thu 5/7

11:25 am-12:44 am

2 stops20h 19m

$580

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sat 4/25

11:59 pm-10:30 am

1 stop27h 31m

Lisbon Humberto Delgado

Thu 4/30

5:05 am-3:40 pm

1 stop17h 35m

$592

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

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 18h 20m. United Airlines provides one of the quickest options available for as low as $566. 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 ($251), British Airways ($325), and American Airlines ($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 January 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$458Average$663FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$514Average$1,067FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$555Average$867FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$560Average$1,073FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$574Average$692FlexibilityNo cancel feeOn-time77%
DeltaCheapest$575Average$958FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$599Average$761FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$603Average$984FlexibilityNo cancel feeOn-time72%
Air CanadaCheapest$625Average$882FlexibilityNo cancel feeOn-time67%
Air FranceCheapest$655Average$1,069FlexibilityNo cancel feeOn-time77%

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