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Portugal

$245+ Cheap flights from Denver (DEN) 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 2/1. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LIS
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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Find flight deals from Denver to Portugal

Cheapest flights from Denver to Portugal
Explore the most affordable flight options available from Denver to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 6, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/4. 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.
Wed 12/34:20 pmDEN - OPO
1 stop13h 55mLufthansa
Wed 12/106:00 amOPO - DEN
1 stop17h 00mLufthansa
Deal found 11/4$530
This United Airlines deal was found by Cheapflights users on 11/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/155:56 pmDEN - LIS
1 stop33h 19mUnited Airlines
Wed 12/35:00 amLIS - DEN
1 stop18h 00mUnited Airlines
Deal found 11/6$562
This KAYAK deal was found by Cheapflights users on 11/5. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/174:20 pmDEN - LIS
1 stop24h 10mLufthansa
Tue 12/22:10 pmLIS - DEN
1 stop31h 25mLufthansa
Deal found 11/5$564
This Delta deal was found by Cheapflights users on 11/4. 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.
Sun 11/1611:47 amDEN - LIS
1 stop13h 13mDelta
Thu 12/45:00 amLIS - DEN
2 stops25h 45mDelta
Deal found 11/4$565
This KAYAK deal was found by Cheapflights users on 11/5. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/185:25 pmDEN - LIS
2 stops23h 05mLufthansa
Wed 12/35:00 amLIS - DEN
2 stops26h 15mLufthansa
Deal found 11/5$567
This KAYAK deal was found by Cheapflights users on 11/4. 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.
Tue 11/185:25 pmDEN - LIS
2 stops23h 05mLufthansa
Tue 12/22:10 pmLIS - DEN
1 stop31h 25mLufthansa
Deal found 11/4$569
This United Airlines deal was found by Cheapflights users on 11/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/169:35 amDEN - LIS
1 stop17h 40mUnited Airlines
Tue 12/212:20 pmLIS - DEN
1 stop34h 40mUnited Airlines
Deal found 11/5$570
This Delta deal was found by Cheapflights users on 11/4. 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.
Sun 11/1611:47 amDEN - LIS
1 stop13h 13mDelta
Fri 12/511:25 amLIS - DEN
2 stops29h 36mDelta
Deal found 11/4$571
This Finnair deal was found by Cheapflights users on 11/6. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1812:10 pmDEN - LIS
1 stop13h 55mMultiple Airlines
Mon 1/124:10 pmLIS - DEN
2 stops33h 03mMultiple Airlines
Deal found 11/6$572
This Air Canada deal was found by Cheapflights users on 11/5. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/167:25 pmDEN - LIS
2 stops30h 55mAir Canada
Thu 12/410:55 amLIS - DEN
2 stops38h 11mAir Canada
Deal found 11/5$577
This Air Canada deal was found by Cheapflights users on 11/4. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:15 amDEN - OPO
2 stops17h 50mMultiple Airlines
Wed 12/106:00 amOPO - DEN
2 stops41h 40mMultiple Airlines
Deal found 11/4$583
This Cheapflightsfares deal was found by Cheapflights users on 11/4. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/44:20 pmDEN - OPO
1 stop13h 30mLufthansa
Thu 12/116:00 amOPO - DEN
1 stop17h 00mLufthansa
Deal found 11/4$610

Cheap flight deals from Denver to Portugal

Keep the following information in mind while searching for Denver to Portugal flight deals. Data was last updated November 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$530
(Kiwi.com)

One-way from

$245
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$765
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 Denver Intl to Portugal
Search Deals
One-way flight from Denver Intl to Portugal
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($182 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($39 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 Denver 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 November 6, 2025.
Use the filters below to find and compare flights from Denver to Portugal that are best for you.

Fly from

Denver

Fly to

Portugal

Route

Depart

Return

Price

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Mon 12/29

7:50 am-10:15 am

1 stop19h 25m

Lisbon Humberto Delgado

Tue 1/13

11:20 am-7:55 pm

1 stop15h 35m

$564

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 11/18

12:10 pm-9:05 am

1 stop13h 55m

Lisbon Humberto Delgado

Mon 1/12

4:10 pm-6:13 pm

2 stops33h 03m

$572

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sun 11/16

5:45 am-8:00 am

2 stops19h 15m

Lisbon Humberto Delgado

Thu 12/4

5:30 am-8:37 pm

2 stops22h 07m

$575

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 12/3

5:35 pm-10:25 pm

2 stops21h 50m

Porto

Wed 12/10

6:00 am-4:00 pm

1 stop17h 00m

$580

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Thu 12/4

4:20 pm-12:50 pm

1 stop13h 30m

Porto

Thu 12/11

6:00 am-4:00 pm

1 stop17h 00m

$610

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Mon 12/1

5:56 pm-10:15 am

1 stop33h 19m

Lisbon Humberto Delgado

Sun 12/14

10:50 am-10:23 am

1 stop30h 33m

$610

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sat 11/15

8:30 pm-10:15 am

2 stops30h 45m

Lisbon Humberto Delgado

Sun 11/23

5:00 am-7:40 pm

2 stops21h 40m

$615

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sat 11/15

11:15 am-8:10 am

2 stops13h 55m

Lisbon Humberto Delgado

Wed 12/3

6:10 am-8:04 pm

2 stops20h 54m

$617

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sat 11/15

11:47 am-3:10 pm

2 stops20h 23m

Lisbon Humberto Delgado

Wed 12/3

11:25 am-11:45 pm

2 stops19h 20m

$619

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Thu 12/4

11:15 am-12:05 pm

2 stops17h 50m

Porto

Thu 12/11

6:00 am-8:53 am

2 stops33h 53m

$626

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Showing 1-10 of 50 results
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Best time to book a flight from Denver to Portugal

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

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

Currently, November is the cheapest month in which you can book a flight from Denver to Portugal (average of $511). Flying from Denver to Portugal in June is currently the most expensive (average of $1,005). 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.

What is the cheapest time of day to fly from DEN to PT?

Find hourly flight availability from Denver to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 6, 2025.

It’s typically best to fly out from Denver to Portugal in the evening. Doing so could potentially save you 27% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Denver to Portugal?

Use this chart to determine the cheapest time to fly round-trip from Denver to Portugal. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Denver to Portugal flight should consider departing on Thursday mornings when fares are most often at their lowest. Tuesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. 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 Portugal. Reviews last updated November 6, 2025.
See what other customers who have flown with United Airlines, Turkish Airlines, and Air Canada from Denver to Portugal have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,007 reviews

Food

6.6

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,007 reviews
United Airlines
7.4
Good
9,007 reviews

Food

6.6

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Turkish Airlines
7.3
Good
4,032 reviews
United Airlines
7.4
Good
9,007 reviews

Food

6.6

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Air Canada
7.1
Good
10,416 reviews
United Airlines
7.4
Good
9,007 reviews

Food

6.6

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Lufthansa
6.8
Okay
7,558 reviews
United Airlines
7.4
Good
9,007 reviews

Food

6.6

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
British Airways
6.7
Okay
7,500 reviews
United Airlines
7.4
Good
9,007 reviews

Food

6.6

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

Related info for your journey

Find useful and relevant information for your journey from Denver to Portugal. 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 from for flights from Denver to Portugal?

    Most people fly from Denver Intl (DEN) if they book a flight from Denver to Portugal. Denver Intl is conveniently located just 18.5 mi from Denver’s city center.

  • How long is the flight from Denver to Portugal?

    For as low as $575, United Airlines can have you in Portugal from Denver in 19h 15m. The distance between Denver and Portugal is about 4826 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from Denver to Portugal?

    Most travelers choose Denver Intl - Lisbon Humberto Delgado, Denver Intl - Porto or Denver Intl - Funchal Madeira when deciding on the best route from Denver to Portugal.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Denver to Portugal (average of $511). Flying from Denver to Portugal in June is currently the most expensive (average of $1,005). 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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Top 10 airlines flying from Denver to Portugal

Discover the top 10 airlines that operate flights from Denver 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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$458Average$670FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$539Average$984FlexibilityNo cancel feeOn-time72%
Turkish AirlinesCheapest$555Average$688FlexibilityNo cancel feeOn-time77%
DeltaCheapest$558Average$931FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$567Average$1,061FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$569Average$883FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$588Average$939FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$594Average$1,265FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$596Average$928FlexibilityNo cancel feeOn-time67%
KLMCheapest$599Average$816FlexibilityNo cancel feeOn-time75%

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