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$465+ Cheap flights from Portugal to Denver (DEN)

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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — DEN
Jul 21 — Jul 281
Tue 7/21
Tue 7/28
1 adult, Economy
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Cheap flight deals from Portugal to Denver

Cheapest flights from Portugal to Denver
Explore the most affordable flight options available from Portugal to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 21, 2026.

This Icelandair deal was found by Cheapflights users on 6/19. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/192:00 pm
LIS
-
DEN
1 stop35h 05m
Icelandair
Mon 11/233:40 pm
DEN
-
LIS
1 stop14h 10m
Icelandair
Deal found 6/19$694
This Icelandair deal was found by Cheapflights users on 6/15. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/52:00 pm
LIS
-
DEN
1 stop35h 05m
Icelandair
Mon 11/93:40 pm
DEN
-
LIS
1 stop14h 10m
Icelandair
Deal found 6/15$833
This Icelandair deal was found by Cheapflights users on 6/20. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/63:00 pm
LIS
-
DEN
1 stop35h 00m
Icelandair
Wed 10/144:40 pm
DEN
-
LIS
1 stop14h 10m
Icelandair
Deal found 6/20$854
This American Airlines deal was found by Cheapflights users on 6/19. 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.
Thu 11/198:20 am
LIS
-
DEN
2 stops21h 02m
American Airlines
Mon 11/234:36 pm
DEN
-
LIS
2 stops19h 19m
American Airlines
Deal found 6/19$860
This American Airlines deal was found by Cheapflights users on 6/16. 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.
Thu 11/58:20 am
LIS
-
DEN
2 stops21h 02m
American Airlines
Mon 11/95:25 pm
DEN
-
LIS
1 stop18h 30m
American Airlines
Deal found 6/16$869
This British Airways deal was found by Cheapflights users on 6/20. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/711:05 am
LIS
-
DEN
1 stop18h 18m
British Airways
Tue 10/1312:39 pm
DEN
-
LIS
2 stops27h 21m
British Airways
Deal found 6/20$874
This British Airways deal was found by Cheapflights users on 6/20. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1711:05 am
LIS
-
DEN
1 stop18h 19m
British Airways
Thu 9/246:40 pm
DEN
-
LIS
1 stop21h 25m
British Airways
Deal found 6/20$876
This Iberia deal was found by Cheapflights users on 6/19. 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 10/141:35 pm
FNC
-
DEN
2 stops37h 57m
Iberia
Sun 10/186:35 pm
DEN
-
FNC
2 stops59h 20m
Iberia
Deal found 6/19$1,077

Find flight deals from Portugal to Denver

Keep the following information in mind while searching for Portugal to Denver flight deals. Data was last updated June 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$694
(Icelandair)

One-way from

$465
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$1,393
Provider with most accurate pricing for Lisbon Humberto Delgado-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lisbon Humberto Delgado-Denver Intl flights.
Search Deals
From Portugal to Denver Intl
Search Deals
One-way flight from Portugal to Denver Intl
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($183 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portugal to Denver 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 June 21, 2026.
Use the filters below to find and compare flights from Portugal to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 11/19

2:00 pm-6:05 pm

1 stop35h 05m

Denver Intl

Mon 11/23

3:40 pm-12:50 pm

1 stop14h 10m

$694

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 11/5

2:00 pm-6:05 pm

1 stop35h 05m

Denver Intl

Mon 11/9

3:40 pm-12:50 pm

1 stop14h 10m

$833

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 11/19

8:20 am-10:22 pm

2 stops21h 02m

Denver Intl

Mon 11/23

4:36 pm-6:55 pm

2 stops19h 19m

$861

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 11/5

8:20 am-10:22 pm

2 stops21h 02m

Denver Intl

Mon 11/9

5:25 pm-6:55 pm

1 stop18h 30m

$869

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 9/17

11:05 am-10:24 pm

1 stop18h 19m

Denver Intl

Thu 9/24

6:40 pm-11:05 pm

1 stop21h 25m

$884

FunchalDenver

FNC - DEN

FNCDEN

Funchal Madeira

Wed 10/14

1:35 pm-8:32 pm

2 stops37h 57m

Denver Intl

Sun 10/18

6:35 pm-12:55 pm

2 stops59h 20m

$1,077

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Tue 9/29

8:15 am-10:22 am

2 stops33h 07m

Denver Intl

Thu 10/1

4:40 pm-10:50 pm

2 stops23h 10m

$1,097

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Fri 7/24

11:35 am-10:33 am

2 stops29h 58m

Denver Intl

Fri 8/7

4:40 pm-10:55 am

3 stops35h 15m

$1,107

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Fri 7/24

5:00 am-6:50 pm

2 stops20h 50m

Denver Intl

Fri 8/7

11:05 am-2:35 pm

2 stops20h 30m

$1,125
Quickest round-trip

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Wed 7/15

5:35 am-3:40 pm

1 stop17h 05m

Denver Intl

Wed 7/22

5:40 pm-2:55 pm

1 stop14h 15m

$1,129

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/16

Showing 1-10 of 25 resultsSorted by cheapest first
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Best time to book a flight from Portugal to Denver

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

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

Currently, May is the cheapest month in which you can book a flight from Portugal to Denver (average of $737). Flying from Portugal to Denver in August is currently the most expensive (average of $1,044). 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 Portugal to Denver. 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 into for flights to Denver from Portugal?

    For a flight from Portugal to Denver, you will be flying into Denver Intl. Denver Intl (DEN) is just 18.5 mi from the center of the city.

  • How long is the flight from Portugal to Denver?

    Airlines like Icelandair, American Airlines, and Iberia fly from Portugal to Denver in about 21h 02m. The time it takes to get you to your destination can typically vary by up to 16h 55m. The distance from Portugal to Denver is about 4826 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    $566 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on American Airlines and Aer Lingus, with prices starting from $571 and $600, respectively.

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

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

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

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

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

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

    Currently, May is the cheapest month in which you can book a flight from Portugal to Denver (average of $737). Flying from Portugal to Denver in August is currently the most expensive (average of $1,044). 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

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Thornton
Black Hawk
Centennial
Westminster
Lakewood
Broomfield
Golden
Greeley
Fort Morgan
Lone Tree
Wheat Ridge
Silverthorne
Central City
Cripple Creek
Winter Park
Manitou Springs
Frisco
Englewood
Glendale
Evergreen

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