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$324+ 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 1/22. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — DEN
Dec 18 — Dec 251
Thu 12/18
Thu 12/25
1 adult, Economy
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Find 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 November 18, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/225:55 pmLIS - DEN
2 stops46h 08mMultiple Airlines
Wed 12/103:40 pmDEN - LIS
1 stop21h 40mMultiple Airlines
Deal found 11/16$786
This Kiwi.com deal was found by Cheapflights users on 11/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/215:55 pmLIS - DEN
2 stops52h 47mMultiple Airlines
Sat 12/63:40 pmDEN - LIS
1 stop21h 40mMultiple Airlines
Deal found 11/16$806
This United Airlines deal was found by Cheapflights users on 11/18. 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.
Fri 12/125:00 amLIS - DEN
1 stop15h 40mUnited Airlines
Sun 12/286:00 amDEN - LIS
1 stop21h 15mUnited Airlines
Deal found 11/18$857
This Trip.com deal was found by Cheapflights users on 11/17. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2110:00 amLIS - DEN
1 stop22h 30mMultiple Airlines
Wed 12/312:59 amDEN - LIS
2 stops24h 56mMultiple Airlines
Deal found 11/17$871
This United Airlines deal was found by Cheapflights users on 11/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:10 amLIS - DEN
1 stop19h 45mUnited Airlines
Tue 12/307:50 amDEN - LIS
2 stops17h 20mUnited Airlines
Deal found 11/16$872
This lol.travel deal was found by Cheapflights users on 11/18. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/125:00 amLIS - DEN
2 stops18h 30mLufthansa
Sun 12/2811:20 amDEN - LIS
1 stop15h 55mLufthansa
Deal found 11/18$881
This United Airlines deal was found by Cheapflights users on 11/18. 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 11/2611:55 amLIS - DEN
1 stop14h 34mUnited Airlines
Wed 12/39:35 amDEN - LIS
2 stops15h 35mUnited Airlines
Deal found 11/18$891
This United Airlines deal was found by Cheapflights users on 11/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2310:15 amLIS - DEN
2 stops16h 49mUnited Airlines
Sat 12/611:15 amDEN - LIS
2 stops13h 55mUnited Airlines
Deal found 11/16$893
This Delta deal was found by Cheapflights users on 11/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/275:00 amLIS - DEN
2 stops19h 25mDelta
Tue 3/311:10 amDEN - LIS
2 stops21h 00mDelta
Deal found 11/16$895
This United Airlines deal was found by Cheapflights users on 11/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2710:15 amLIS - DEN
1 stop14h 52mUnited Airlines
Tue 3/38:20 pmDEN - LIS
1 stop20h 10mUnited Airlines
Deal found 11/16$901
This FlightHub deal was found by Cheapflights users on 11/18. 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.
Thu 12/49:30 pmFNC - DEN
2 stops24h 05mLufthansa
Thu 1/14:05 pmDEN - FNC
2 stops21h 20mLufthansa
Deal found 11/18$3,116
This United Airlines deal was found by Cheapflights users on 11/17. 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 12/34:10 amFNC - DEN
2 stops27h 05mUnited Airlines
Thu 1/14:05 pmDEN - FNC
2 stops14h 25mUnited Airlines
Deal found 11/17$4,320

Cheap flight deals from Portugal to Denver

Keep the following information in mind while searching for Portugal to Denver flight deals. Data was last updated November 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$756
(Mytrip)

One-way from

$324
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$941
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. 7% potential increase in price ($73 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 November 18, 2025.
Use the filters below to find and compare flights from Portugal to Denver that are best for you.

Fly from

Portugal

Fly to

Denver

Route

Depart

Return

Price

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Mon 2/16

2:40 pm-6:05 pm

2 stops34h 25m

Denver Intl

Mon 2/23

3:40 pm-8:25 pm

3 stops21h 45m

$756

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Mon 2/16

6:35 pm-3:30 pm

1 stop27h 55m

Denver Intl

Mon 2/23

5:25 pm-9:55 pm

1 stop21h 30m

$837

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Fri 12/12

5:00 am-1:40 pm

1 stop15h 40m

Denver Intl

Sun 12/28

6:00 am-10:15 am

1 stop21h 15m

$857

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Wed 4/29

5:05 am-1:35 pm

1 stop15h 30m

Denver Intl

Sun 5/3

6:00 am-10:30 am

1 stop21h 30m

$857

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Fri 5/15

5:05 am-1:35 pm

1 stop15h 30m

Denver Intl

Sun 5/31

5:40 pm-9:20 am

1 stop32h 40m

$859

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Tue 5/12

5:05 am-1:35 pm

1 stop15h 30m

Denver Intl

Fri 5/29

5:40 pm-9:20 am

1 stop32h 40m

$859

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Fri 5/15

5:05 am-1:35 pm

1 stop15h 30m

Denver Intl

Sat 5/30

10:40 am-9:20 am

1 stop15h 40m

$859

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Tue 5/12

5:05 am-1:35 pm

1 stop15h 30m

Denver Intl

Sun 5/31

5:40 pm-9:20 am

1 stop32h 40m

$859

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Fri 5/15

5:05 am-1:35 pm

1 stop15h 30m

Denver Intl

Thu 5/28

5:40 pm-9:20 am

1 stop32h 40m

$859

FunchalDenver

FNC - DEN

FNCDEN

Funchal Madeira

Thu 4/2

10:05 am-8:28 pm

2 stops41h 23m

Denver Intl

Mon 4/6

2:20 pm-9:35 am

2 stops36h 15m

$1,049

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/16

Showing 1-10 of 31 results
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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, February is the cheapest month in which you can book a flight from Portugal to Denver (average of $703). Flying from Portugal to Denver in July is currently the most expensive (average of $941). 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.

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. 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 Denver. Reviews last updated November 18, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines, and British Airways from Portugal to Denver to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,007 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,007 reviews
Delta
7.9
Good
8,007 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,015 reviews
Delta
7.9
Good
8,007 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
British Airways
6.7
Okay
7,528 reviews
Delta
7.9
Good
8,007 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 British Airways, United Airlines, and KLM fly from Portugal to Denver in about 15h 40m. The time it takes to get you to your destination can typically vary by up to 25h 43m. The distance from Portugal to Denver is about 4826 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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, February is the cheapest month in which you can book a flight from Portugal to Denver (average of $703). Flying from Portugal to Denver in July is currently the most expensive (average of $941). 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
Black Hawk
Westminster
Broomfield
Lakewood
Golden
Winter Park
Greeley
Lone Tree
Cripple Creek
Thornton
Silverthorne
Wheat Ridge
Central City
Manitou Springs
Fort Morgan
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Parker
Sterling

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Top 3 airlines flying from Portugal to Denver

Discover the top 3 airlines that operate flights from Portugal to Denver. 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 November 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$749Average$932FlexibilityNo cancel feeOn-time70%
DeltaCheapest$758Average$958FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$809Average$1,063FlexibilityNo cancel feeOn-time69%

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