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$265+ 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 10/19. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LIS
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
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 February, booked 4 days in advance, depart on a Wednesday or Monday and return on a Wednesday

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 August 20, 2025.

Round-trip from

$673
(United Airlines)

One-way from

$265
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,000
From Denver Intl to Lisbon Humberto Delgado
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One-way flight from Denver Intl to Lisbon Humberto Delgado
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Highest demand for flights based on searches. 16% potential increase in price ($186 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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 August 20, 2025.

This United Airlines deal was found by Cheapflights users on 8/18. 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 10/154:15 pmDEN - LIS
1 stop22h 35mUnited Airlines
Sat 11/110:15 amLIS - DEN
1 stop15h 25mUnited Airlines
Deal found 8/18$673
This Cheapflightsfares deal was found by Cheapflights users on 8/18. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/84:15 pmDEN - LIS
1 stop14h 25mLufthansa
Wed 11/125:00 amLIS - DEN
1 stop18h 00mLufthansa
Deal found 8/18$674
This United Airlines deal was found by Cheapflights users on 8/19. 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 12/2911:59 pmDEN - LIS
2 stops25h 56mUnited Airlines
Wed 1/75:00 amLIS - DEN
2 stops21h 28mUnited Airlines
Deal found 8/19$678
This Ovago deal was found by Cheapflights users on 8/17. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/185:25 pmDEN - LIS
1 stop21h 20mBritish Airways
Fri 11/2811:05 amLIS - DEN
1 stop19h 17mBritish Airways
Deal found 8/17$679
This United deal was found by Cheapflights users on 8/19. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1811:59 pmDEN - LIS
1 stop27h 31mMultiple Airlines
Tue 10/285:00 amLIS - DEN
1 stop18h 00mMultiple Airlines
Deal found 8/19$680
This KAYAK deal was found by Cheapflights users on 8/19. 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.
Fri 10/174:15 pmDEN - LIS
1 stop22h 35mLufthansa
Mon 11/33:55 pmLIS - DEN
1 stop31h 05mLufthansa
Deal found 8/19$681
This United Airlines deal was found by Cheapflights users on 8/18. 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.
Mon 10/131:25 pmDEN - LIS
1 stop14h 40mUnited Airlines
Tue 10/2112:55 pmLIS - DEN
3 stops33h 05mUnited Airlines
Deal found 8/18$683
This CheapOair deal was found by Cheapflights users on 8/18. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/811:15 amDEN - LIS
1 stop14h 40mMultiple Airlines
Sun 11/235:00 amLIS - DEN
1 stop18h 00mMultiple Airlines
Deal found 8/18$684
This Gotogate deal was found by Cheapflights users on 8/18. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/131:25 pmDEN - LIS
1 stop14h 40mMultiple Airlines
Tue 10/214:15 pmLIS - DEN
1 stop30h 20mMultiple Airlines
Deal found 8/18$685
This United deal was found by Cheapflights users on 8/18. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/154:15 pmDEN - LIS
1 stop22h 35mMultiple Airlines
Fri 10/245:05 amLIS - DEN
1 stop17h 30mMultiple Airlines
Deal found 8/18$686

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 August 20, 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

Wed 10/15

4:15 pm-9:50 pm

1 stop22h 35m

Lisbon Humberto Delgado

Sat 11/1

10:15 am-7:40 pm

1 stop15h 25m

$673

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Wed 10/8

4:15 pm-1:40 pm

1 stop14h 25m

Lisbon Humberto Delgado

Wed 11/12

5:00 am-4:00 pm

1 stop18h 00m

$675

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Mon 12/29

11:59 pm-8:55 am

2 stops25h 56m

Lisbon Humberto Delgado

Wed 1/7

5:00 am-7:28 pm

2 stops21h 28m

$678

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 11/18

5:25 pm-9:45 pm

1 stop21h 20m

Lisbon Humberto Delgado

Fri 11/28

11:05 am-11:22 pm

1 stop19h 17m

$679

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sat 10/18

11:59 pm-10:30 am

1 stop27h 31m

Lisbon Humberto Delgado

Tue 10/28

5:00 am-5:00 pm

1 stop18h 00m

$680

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 10/14

1:25 pm-11:05 am

1 stop14h 40m

Lisbon Humberto Delgado

Tue 10/21

12:15 pm-11:30 pm

2 stops18h 15m

$680

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sat 10/18

11:59 pm-10:30 am

1 stop27h 31m

Lisbon Humberto Delgado

Thu 10/30

5:00 am-2:40 pm

1 stop15h 40m

$680

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Wed 11/5

12:21 pm-3:25 pm

2 stops20h 04m

Lisbon Humberto Delgado

Sun 11/9

11:05 am-7:55 pm

2 stops15h 50m

$680

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 10/14

1:25 pm-11:05 am

1 stop14h 40m

Lisbon Humberto Delgado

Wed 10/22

5:05 am-9:17 pm

2 stops23h 12m

$680

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sat 10/18

11:59 pm-10:30 am

1 stop27h 31m

Lisbon Humberto Delgado

Wed 10/29

5:00 am-5:00 pm

1 stop18h 00m

$680

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

Showing 1-10 of 19 results
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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 August 8, 2025.

Booking 4 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, January is the cheapest month in which you can book a flight from Denver to Lisbon (average of $612). Flying from Denver to Lisbon in June is currently the most expensive (average of $1,127). 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 August 20, 2025.

It’s optimal to fly from Denver to Lisbon in the morning. By choosing this option you can save up to 11% 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 August 20, 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
8.0
Very good
7,982 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,928 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
10,000 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Lufthansa
6.8
Okay
7,337 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
British Airways
6.7
Okay
7,289 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 $675, United Airlines can have you in Lisbon from Denver in 14h 25m. Denver and Lisbon are separated by a distance of 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 flying from Denver to Lisbon round-trip?

    According to our current data, Icelandair ($458), Virgin Atlantic ($539), and Delta ($551) offers the cheapest pricing from Denver to Lisbon. Users have found that Icelandair is 52% 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 $60 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 $41 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, January is the cheapest month in which you can book a flight from Denver to Lisbon (average of $612). Flying from Denver to Lisbon in June is currently the most expensive (average of $1,127). 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
Beja
Fátima
Oeiras
Nazaré
Ericeira
Costa da Caparica
Torres Vedras
Sesimbra
Colares

Browse thousands of different options on Cheapflights for your next trip

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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 August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$458Average$668FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$539Average$1,177FlexibilityNo cancel feeOn-time72%
DeltaCheapest$551Average$942FlexibilityNo cancel feeOn-timeN/A
Turkish AirlinesCheapest$555Average$676FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$569Average$902FlexibilityNo cancel feeOn-time77%
Scandinavian AirlinesCheapest$582Average$708FlexibilityNo cancel feeOn-time77%
KLMCheapest$599Average$791FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$607Average$879FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$619Average$897FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$637Average$994FlexibilityNo cancel feeOn-time69%

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