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$393+ 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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — DEN
Feb 6 — Feb 131
Fri 2/6
Fri 2/13
1 adult, Economy
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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 January 7, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$679
(Kiwi.com)

One-way from

$393
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$933
Provider with most accurate pricing for Lisbon Humberto Delgado-Denver Intl flight deals.
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Provider most trusted by Cheapflights users for Lisbon Humberto Delgado-Denver Intl flights.
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From Portugal to Denver Intl
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One-way flight from Portugal to Denver Intl
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Highest demand for flights based on searches. 6% potential increase in price ($66 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 7, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/5. 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.
Thu 1/223:20 pmLIS - DEN
2 stops49h 40mMultiple Airlines
Wed 2/43:40 pmDEN - LIS
1 stop21h 40mMultiple Airlines
Deal found 1/5$679
This Billigflug deal was found by Cheapflights users on 1/6. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/188:20 amLIS - DEN
2 stops18h 45mMultiple Airlines
Wed 3/1812:33 pmDEN - LIS
2 stops17h 37mMultiple Airlines
Deal found 1/6$732
This Billigflug deal was found by Cheapflights users on 1/6. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/136:30 amLIS - DEN
2 stops20h 35mMultiple Airlines
Tue 3/176:25 pmDEN - LIS
1 stop17h 15mMultiple Airlines
Deal found 1/6$733
This Billigflug deal was found by Cheapflights users on 1/6. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/1811:05 amLIS - DEN
2 stops16h 48mMultiple Airlines
Mon 2/23:17 pmDEN - LIS
2 stops16h 38mMultiple Airlines
Deal found 1/6$734
This Billigflug deal was found by Cheapflights users on 1/6. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/1311:05 amLIS - DEN
1 stop17h 31mBritish Airways
Wed 3/186:25 pmDEN - LIS
1 stop21h 25mBritish Airways
Deal found 1/6$736
This Billigflug deal was found by Cheapflights users on 1/6. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/137:05 amLIS - DEN
2 stops22h 32mMultiple Airlines
Wed 3/1810:20 amDEN - LIS
2 stops19h 50mMultiple Airlines
Deal found 1/6$742
This Billigflug deal was found by Cheapflights users on 1/6. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/1311:05 amLIS - DEN
2 stops18h 35mBritish Airways
Tue 3/1712:19 pmDEN - LIS
2 stops14h 46mBritish Airways
Deal found 1/6$747
This American Airlines deal was found by Cheapflights users on 1/5. 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.
Wed 4/156:35 amLIS - DEN
2 stops23h 05mAmerican Airlines
Sun 4/196:40 pmDEN - LIS
1 stop21h 20mAmerican Airlines
Deal found 1/5$751
This Iberia deal was found by Cheapflights users on 1/7. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/208:20 amLIS - DEN
2 stops21h 17mMultiple Airlines
Sat 2/285:25 pmDEN - LIS
1 stop14h 25mMultiple Airlines
Deal found 1/7$753
This American Airlines deal was found by Cheapflights users on 1/7. 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.
Sun 1/1811:05 amLIS - DEN
2 stops17h 11mAmerican Airlines
Tue 2/33:17 pmDEN - LIS
2 stops16h 28mAmerican Airlines
Deal found 1/7$754
This KLM deal was found by Cheapflights users on 1/6. 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.
Sat 2/216:40 pmFNC - DEN
2 stops32h 25mKLM
Sat 2/2811:10 amDEN - FNC
2 stops39h 25mKLM
Deal found 1/6$962
This Expedia deal was found by Cheapflights users on 1/6. 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.
Sat 2/219:15 pmFNC - DEN
2 stops29h 16mLufthansa
Sat 2/283:55 pmDEN - FNC
1 stop15h 35mLufthansa
Deal found 1/6$1,017

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 January 7, 2026.
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

Thu 1/22

3:20 pm-10:00 am

2 stops49h 40m

Denver Intl

Wed 2/4

3:40 pm-8:20 pm

1 stop21h 40m

$679

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Wed 2/18

8:20 am-8:05 pm

2 stops18h 45m

Denver Intl

Wed 3/18

12:33 pm-12:10 pm

2 stops17h 37m

$732

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Sun 2/15

7:45 am-8:50 pm

2 stops20h 05m

Denver Intl

Tue 3/17

6:25 pm-5:40 pm

1 stop17h 15m

$733

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Fri 2/13

6:30 am-8:05 pm

2 stops20h 35m

Denver Intl

Wed 3/18

6:25 pm-9:50 pm

1 stop21h 25m

$733

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Sun 1/18

11:05 am-8:53 pm

2 stops16h 48m

Denver Intl

Mon 2/2

3:17 pm-2:55 pm

2 stops16h 38m

$734

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Sun 2/15

11:05 am-9:36 pm

1 stop17h 31m

Denver Intl

Tue 3/17

6:25 pm-5:40 pm

1 stop17h 15m

$736

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Fri 2/13

11:05 am-9:36 pm

1 stop17h 31m

Denver Intl

Tue 3/17

6:25 pm-5:40 pm

1 stop17h 15m

$736

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Fri 2/13

11:05 am-9:36 pm

1 stop17h 31m

Denver Intl

Wed 3/18

6:25 pm-9:50 pm

1 stop21h 25m

$736

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Wed 2/18

11:05 am-9:36 pm

1 stop17h 31m

Denver Intl

Wed 3/18

6:25 pm-9:50 pm

1 stop21h 25m

$736

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Fri 2/20

8:20 am-10:37 pm

2 stops21h 17m

Denver Intl

Sat 2/28

5:25 pm-2:50 pm

1 stop14h 25m

$753

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/5

Showing 1-10 of 28 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 $705). 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 January 7, 2026.
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
8,025 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Food

7.2

Overall

7.9

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
8,025 reviews
Delta
7.9
Good
8,025 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Food

7.2

Overall

7.9

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
9,138 reviews
Delta
7.9
Good
8,025 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Food

7.2

Overall

7.9

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
7,657 reviews
Delta
7.9
Good
8,025 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Food

7.2

Overall

7.9

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 KLM, Lufthansa, and TAP AIR PORTUGAL fly from Portugal to Denver in about 29h 16m. The time it takes to get you to your destination can typically vary by up to 3h 09m. The distance from Portugal to Denver is about 4715 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?

    $557 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on British Airways and American Airlines, with prices starting from $564 and $565, 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, February is the cheapest month in which you can book a flight from Portugal to Denver (average of $705). 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
Thornton
Black Hawk
Broomfield
Westminster
Lakewood
Golden
Greeley
Lone Tree
Wheat Ridge
Cripple Creek
Winter Park
Silverthorne
Central City
Frisco
Manitou Springs
Fort Morgan
Brighton
Longmont
Evergreen
Idaho Springs

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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 January 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$704Average$925FlexibilityNo cancel feeOn-time70%
DeltaCheapest$758Average$958FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$809Average$1,063FlexibilityNo cancel feeOn-time69%

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