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$291+ Cheap flights from Denver (DEN) to Lisbon (LIS)

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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LIS
Nov 22 — Nov 291
Sat 11/22
Sat 11/29
1 adult, Economy
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Cheapflights Tip: The best prices from Denver Intl to Lisbon Humberto Delgado are usually found in January or November, booked 62 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Find flight deals from Denver to Lisbon

Cheapest flights from Denver to Lisbon
Explore the most affordable flight options available from Denver to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 23, 2025.

This KAYAK deal was found by Cheapflights users on 10/23. 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.
Wed 11/124:20 pmDEN - LIS
1 stop14h 00mLufthansa
Mon 11/2412:25 pmLIS - DEN
1 stop34h 35mLufthansa
Deal found 10/23$572
This Booking.com deal was found by Cheapflights users on 10/22. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/31:25 pmDEN - LIS
1 stop12h 30mAir Canada
Fri 1/911:20 amLIS - DEN
2 stops37h 47mAir Canada
Deal found 10/22$573
This United Airlines deal was found by Cheapflights users on 10/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/114:05 pmDEN - LIS
1 stop11h 10mUnited Airlines
Fri 11/2111:55 amLIS - DEN
1 stop19h 20mUnited Airlines
Deal found 10/20$575
This KAYAK deal was found by Cheapflights users on 10/23. 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.
Sun 11/95:45 pmDEN - LIS
1 stop22h 05mLufthansa
Wed 11/265:00 amLIS - DEN
2 stops25h 15mLufthansa
Deal found 10/23$576
This United Airlines deal was found by Cheapflights users on 10/23. 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 11/104:20 pmDEN - LIS
1 stop14h 00mUnited Airlines
Fri 11/2111:55 amLIS - DEN
1 stop19h 20mUnited Airlines
Deal found 10/23$577
This KAYAK deal was found by Cheapflights users on 10/22. 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 12/85:45 pmDEN - LIS
1 stop14h 05mLufthansa
Mon 12/152:10 pmLIS - DEN
1 stop31h 25mLufthansa
Deal found 10/22$578
This United Airlines deal was found by Cheapflights users on 10/23. 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 11/127:46 amDEN - LIS
2 stops17h 24mUnited Airlines
Wed 11/2610:15 amLIS - DEN
2 stops20h 00mUnited Airlines
Deal found 10/23$579
This United Airlines deal was found by Cheapflights users on 10/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/114:05 pmDEN - LIS
1 stop11h 10mUnited Airlines
Wed 11/2610:15 amLIS - DEN
2 stops21h 00mUnited Airlines
Deal found 10/20$580
This KAYAK deal was found by Cheapflights users on 10/22. 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 12/24:20 pmDEN - LIS
1 stop24h 10mLufthansa
Mon 12/153:55 pmLIS - DEN
2 stops31h 35mLufthansa
Deal found 10/22$582
This Mytrip deal was found by Cheapflights users on 10/21. 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.
Fri 12/58:45 amDEN - LIS
2 stops17h 35mMultiple Airlines
Fri 12/126:10 amLIS - DEN
1 stop15h 25mMultiple Airlines
Deal found 10/21$583
This KAYAK deal was found by Cheapflights users on 10/23. 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.
Sun 11/95:45 pmDEN - LIS
1 stop22h 05mLufthansa
Mon 11/243:55 pmLIS - DEN
1 stop31h 05mLufthansa
Deal found 10/23$585

Cheap flight deals from Denver to Lisbon

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Lisbon (LIS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$572
(KAYAK)

One-way from

$291
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$815
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 Lisbon Humberto Delgado
Search Deals
One-way flight from Denver Intl to Lisbon Humberto Delgado
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 ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver to Lisbon 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 October 23, 2025.
Use the filters below to find and compare flights from Denver to Lisbon that are best for you.

Fly from

Denver

Fly to

Lisbon

Route

Depart

Return

Price

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 11/11

4:05 pm-10:15 am

1 stop11h 10m

Lisbon Humberto Delgado

Wed 11/26

10:15 am-12:15 am

2 stops21h 00m

$580

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Wed 11/12

4:20 pm-1:20 pm

1 stop14h 00m

Lisbon Humberto Delgado

Wed 11/26

11:55 am-10:35 am

2 stops29h 40m

$581

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 11/11

7:46 am-8:10 am

1 stop17h 24m

Lisbon Humberto Delgado

Sun 11/23

5:00 am-4:00 pm

1 stop18h 00m

$597

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Thu 1/15

11:15 am-9:20 am

1 stop15h 05m

Lisbon Humberto Delgado

Tue 1/20

11:20 am-4:37 pm

2 stops36h 17m

$598

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sun 2/1

1:31 pm-8:10 am

1 stop11h 39m

Lisbon Humberto Delgado

Mon 2/9

5:00 am-1:40 pm

1 stop15h 40m

$601

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sun 3/1

7:45 am-10:15 am

1 stop19h 30m

Lisbon Humberto Delgado

Sun 3/8

5:00 am-4:00 pm

1 stop18h 00m

$602

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Wed 11/12

4:20 pm-1:20 pm

1 stop14h 00m

Lisbon Humberto Delgado

Sun 11/23

5:00 am-4:00 pm

1 stop18h 00m

$603

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Fri 11/7

4:20 pm-1:20 pm

1 stop14h 00m

Lisbon Humberto Delgado

Wed 11/12

5:00 am-4:00 pm

1 stop18h 00m

$603

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Mon 11/10

4:20 pm-1:20 pm

1 stop14h 00m

Lisbon Humberto Delgado

Sat 11/22

5:00 am-4:00 pm

1 stop18h 00m

$603

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Wed 11/12

4:20 pm-1:20 pm

1 stop14h 00m

Lisbon Humberto Delgado

Mon 11/24

5:00 am-4:00 pm

1 stop18h 00m

$603

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/22

Showing 1-10 of 17 results
1
2

Compare providers for flights from Denver to Lisbon

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Denver to Lisbon in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
GurufarePrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Denver-Lisbon flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Lisbon flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-Lisbon flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-Lisbon flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Denver-Lisbon flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Denver to Lisbon

Have a flexible travel schedule? Discover the best time to fly to Lisbon 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 Lisbon

How far ahead should I book a flight from Denver to Lisbon?

Use this chart to determine the optimal time to book a round-trip flight from Denver to Lisbon. Price data was last updated on October 17, 2025.

Booking 62 days in advance of your planned departure date is, on average, the best time to get cheap flights from Denver to Lisbon. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, November is the cheapest month in which you can book a flight from Denver to Lisbon (average of $511). Flying from Denver to Lisbon 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 LIS?

Find hourly flight availability from Denver to Lisbon. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 23, 2025.

It’s optimal to fly from Denver to Lisbon in the morning. By choosing this option you can save up to 10% on the cost of your flight, compared to a flight at noon.

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

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

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

Reviews of airlines servicing Lisbon

Get insights into the airlines that provide service to Lisbon. 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 Lisbon. Reviews last updated October 23, 2025.
See what other customers who have flown with Delta, United Airlines, and Air Canada from Denver to Lisbon have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,982 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,982 reviews
Delta
7.9
Good
7,982 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,995 reviews
Delta
7.9
Good
7,982 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Air Canada
7.1
Good
10,350 reviews
Delta
7.9
Good
7,982 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Lufthansa
6.8
Okay
7,518 reviews
Delta
7.9
Good
7,982 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
British Airways
6.7
Okay
7,468 reviews
Delta
7.9
Good
7,982 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Overall

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

Find useful and relevant information for your journey from Denver to Lisbon. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Denver to Lisbon?

    For as low as $580, United Airlines can have you in Lisbon from Denver in 11h 10m. Denver and Lisbon are separated by a distance of 4826 mi.

  • What are the cheapest airlines flying from Denver to Lisbon round-trip?

    According to our current data, Icelandair ($458), Virgin Atlantic ($539), and Turkish Airlines ($555) offers the cheapest pricing from Denver to Lisbon. Users have found that Icelandair is 51% cheaper than the other options available to this destination.

  • Where are the most common layover locations when flying from Denver to Lisbon?

    Denver to Lisbon flights have a layover in Washington, D.C. most of the time. London is the second most popular location for layovers on flights from Denver to Lisbon.

  • What are some popular things to do or see while on a layover in Washington, D.C.?

    Most Washington, D.C. visitors opt to spend their time experiencing White House, National Mall, and U.S. Capitol. Those on a layover in Washington, D.C. interested in visiting White House, National Mall, or U.S. Capitol can do so by traveling 22.4 mi, 23.3 mi, and 24.0 mi, respectively from Washington, D.C. Dulles Intl. Travelers can book a car rental at Washington, D.C. Dulles Intl for about $51 per day to make their sightseeing more efficient.

  • What are some popular points of interest to see during a layover in London?

    The majority of London visitors spend their time at Hyde Park, Buckingham Palace, and Piccadilly Circus. Hyde Park, Buckingham Palace, and Piccadilly Circus can be visited by traveling about 12.5 mi, 13.7 mi, and 14.1 mi respectively from London Heathrow. Travelers in need of a car in London can rent one for about $30 per day.

  • Where are the least popular layover locations for Denver to Lisbon flights?

    The least popular layover on flights from Denver to Lisbon is New York. Munich sees the next fewest layovers on Denver to Lisbon flights.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Denver to Lisbon (average of $511). Flying from Denver to Lisbon 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

Traveling to a place near Lisbon?

Book flights to Lisbon if you plan to visit one of these locations
Sintra
Fátima
Oeiras
Nazaré
Ericeira
Costa da Caparica
Torres Vedras
Beja
Sesimbra
Colares

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Top 10 airlines flying from Denver to Lisbon

Discover the top 10 airlines that operate flights from Denver to Lisbon. 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 October 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$458Average$666FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$539Average$984FlexibilityNo cancel feeOn-time72%
Turkish AirlinesCheapest$555Average$692FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$569Average$882FlexibilityNo cancel feeOn-time77%
DeltaCheapest$575Average$956FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$582Average$880FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$590Average$885FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$594Average$1,267FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$596Average$926FlexibilityNo cancel feeOn-time67%
KLMCheapest$599Average$800FlexibilityNo cancel feeOn-time75%

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