HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portugal

$225+ 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 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
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Denver to Portugal with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 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 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 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
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/27:50 am
DEN
-
OPO
1 stop18h 40m
United Airlines
Tue 3/176:00 am
OPO
-
DEN
1 stop17h 00m
United Airlines
Deal found 1/26$550
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/74:05 pm
DEN
-
OPO
1 stop24h 20m
Lufthansa
Tue 4/286:20 am
OPO
-
DEN
1 stop15h 00m
Lufthansa
Deal found 1/26$551

Find flight deals from Denver to Portugal

Keep the following information in mind while searching for Denver 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 Denver Intl to Portugal
Search Deals
One-way flight from Denver Intl 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 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 January 28, 2026.
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

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

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Mon 4/27

12:34 pm-8:20 am

1 stop12h 46m

Lisbon Humberto Delgado

Fri 5/1

11:25 am-7:00 pm

1 stop14h 35m

$596

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 60 results
1
2
3
...
6

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 $503). Flying from Denver to Portugal in June is currently the most expensive (average of $1,087). 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 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 January 28, 2026.
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
9,212 reviews

Food

6.6

Boarding

7.7

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,212 reviews
United Airlines
7.4
Good
9,212 reviews

Food

6.6

Boarding

7.7

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Turkish Airlines
7.3
Good
4,209 reviews
United Airlines
7.4
Good
9,212 reviews

Food

6.6

Boarding

7.7

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Air Canada
7.1
Good
10,666 reviews
United Airlines
7.4
Good
9,212 reviews

Food

6.6

Boarding

7.7

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Lufthansa
6.8
Okay
7,749 reviews
United Airlines
7.4
Good
9,212 reviews

Food

6.6

Boarding

7.7

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
British Airways
6.7
Okay
7,704 reviews
United Airlines
7.4
Good
9,212 reviews

Food

6.6

Boarding

7.7

Crew

8.1

Entertainment

7.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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 $566, United Airlines can have you in Portugal from Denver in 18h 20m. 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 cheapest airlines to fly from Denver to Portugal one-way?

    The cheapest airlines for a one-way flight from Denver to Portugal are Icelandair ($251), British Airways ($325), and American Airlines ($333).

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

    Most travelers choose Denver Intl - Lisbon Humberto Delgado, Denver Intl - Porto or Denver Intl - Faro 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 $503). Flying from Denver to Portugal in June is currently the most expensive (average of $1,087). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Denver to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
Denver to Heathrow flights
Denver to Leonardo da Vinci/Fiumicino flights
Denver to Dublin flights
Denver to Frankfurt flights
Denver to Gatwick flights
Denver to Charles de Gaulle flights
Denver to London City flights
Denver to Barcelona-El Prat flights
Denver to Orly flights
Denver to Athens flights
Denver to Malpensa flights
Denver to Stansted flights
Denver to Munich flights
Denver to Madrid flights
Denver to Lisbon flights
Denver to Linate flights
Denver to Amsterdam flights
Denver to Istanbul flights
Denver to Zurich flights
Denver to Keflavik Intl flights
Denver to Vicenza flights
Denver to Florence flights
Denver to Sabiha Gokcen flights
Denver to Edinburgh flights
Denver to Oslo Gardermoen flights
Denver to Geneva flights
Denver to Copenhagen flights
Denver to Budapest flights
Denver to Prague flights
Denver to Luton flights
Denver to Arlanda flights
Denver to Naples flights
Denver to Porto flights
Denver to Glasgow Intl flights
Denver to Berlin flights
Denver to Bruxelles-National flights
Denver to Bologna flights
Denver to Frederic Chopin flights
Denver to Basel flights
Denver to Bergamo flights
Denver to Dubrovnik flights
Denver to Split flights
Denver to Shannon flights
Denver to Nice flights
Denver to Faro flights
Denver to Pisa flights
Denver to Catania flights
Denver to Krakow flights
Denver to Otopeni Intl flights

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 January 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$458Average$663FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$555Average$867FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$560Average$1,073FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$574Average$692FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$574Average$1,223FlexibilityNo cancel feeOn-time69%
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%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
Cookie settings©2026 Cheapflights