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$399+ Cheap flights from Lisbon (LIS) 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 12/15. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — DEN
Oct 29 — Nov 51
Wed 10/29
Wed 11/5
1 adult, Economy
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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

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Cheapflights Tip: The best prices from Lisbon Humberto Delgado to Denver Intl are usually found in February or November, booked 43 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Lisbon to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Lisbon (LIS) to Denver (DEN). 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 September 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$671
(Mytrip)

One-way from

$399
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$1,010
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 Lisbon Humberto Delgado to Denver Intl
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One-way flight from Lisbon Humberto Delgado to Denver Intl
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Highest demand for flights based on searches. 8% potential increase in price ($82 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Lisbon to Denver

Cheapest flights from Lisbon to Denver
Explore the most affordable flight options available from Lisbon to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 29, 2025.

This Mytrip deal was found by Cheapflights users on 9/26. 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 11/246:20 amLIS - DEN
2 stops18h 45mMultiple Airlines
Sat 11/293:40 pmDEN - LIS
2 stops20h 15mMultiple Airlines
Deal found 9/26$671
This Mytrip deal was found by Cheapflights users on 9/28. 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.
Thu 11/137:00 amLIS - DEN
2 stops18h 05mMultiple Airlines
Wed 11/263:40 pmDEN - LIS
3 stops21h 45mMultiple Airlines
Deal found 9/28$704
This lol.travel deal was found by Cheapflights users on 9/27. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/3010:55 amLIS - DEN
1 stop17h 00mBritish Airways
Wed 11/125:25 pmDEN - LIS
1 stop14h 25mBritish Airways
Deal found 9/27$739
This American Airlines deal was found by Cheapflights users on 9/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/3010:55 amLIS - DEN
2 stops31h 39mAmerican Airlines
Wed 11/124:31 pmDEN - LIS
2 stops22h 19mAmerican Airlines
Deal found 9/27$751
This American Airlines deal was found by Cheapflights users on 9/29. 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.
Thu 11/1310:55 amLIS - DEN
2 stops29h 30mAmerican Airlines
Wed 11/268:13 amDEN - LIS
2 stops20h 57mAmerican Airlines
Deal found 9/29$752
This British Airways deal was found by Cheapflights users on 9/29. 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.
Thu 11/1310:55 amLIS - DEN
1 stop19h 23mBritish Airways
Wed 11/265:25 pmDEN - LIS
1 stop21h 25mBritish Airways
Deal found 9/29$753
This British Airways deal was found by Cheapflights users on 9/29. 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.
Wed 10/297:05 amLIS - DEN
1 stop15h 25mBritish Airways
Wed 12/35:25 pmDEN - LIS
1 stop17h 15mBritish Airways
Deal found 9/29$759
This Delta deal was found by Cheapflights users on 9/28. 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.
Wed 11/125:00 amLIS - DEN
2 stops20h 47mDelta
Wed 11/197:10 amDEN - LIS
2 stops21h 10mDelta
Deal found 9/28$765
This British Airways deal was found by Cheapflights users on 9/28. 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.
Wed 11/1211:05 amLIS - DEN
1 stop19h 13mBritish Airways
Wed 11/1912:05 pmDEN - LIS
1 stop13h 50mBritish Airways
Deal found 9/28$766
This Iberia deal was found by Cheapflights users on 9/28. 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 11/126:30 amLIS - DEN
2 stops22h 52mMultiple Airlines
Wed 11/195:25 pmDEN - LIS
1 stop17h 15mMultiple Airlines
Deal found 9/28$769

Cheapflights Fare Finder

 
Customize your flight search to find flights from Lisbon 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 September 29, 2025.
Use the filters below to find and compare flights from Lisbon to Denver that are best for you.

Fly from

Lisbon

Fly to

Denver

Route

Depart

Return

Price

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Mon 11/24

6:20 am-6:05 pm

2 stops18h 45m

Denver Intl

Sat 11/29

3:40 pm-6:55 pm

2 stops20h 15m

$671

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 11/13

7:00 am-6:05 pm

2 stops18h 05m

Denver Intl

Wed 11/26

3:40 pm-8:25 pm

3 stops21h 45m

$704

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 10/30

10:55 am-9:55 pm

1 stop17h 00m

Denver Intl

Wed 11/12

5:25 pm-2:50 pm

1 stop14h 25m

$739

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 10/30

10:55 am-12:34 pm

2 stops31h 39m

Denver Intl

Wed 11/12

5:25 pm-12:10 pm

1 stop35h 45m

$751

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 11/13

10:55 am-11:18 pm

1 stop19h 23m

Denver Intl

Wed 11/26

5:25 pm-9:50 pm

1 stop21h 25m

$752

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Wed 10/29

7:05 am-4:30 pm

1 stop15h 25m

Denver Intl

Wed 12/3

5:25 pm-5:40 pm

1 stop17h 15m

$759

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Thu 11/13

5:00 am-3:39 pm

2 stops17h 39m

Denver Intl

Wed 11/26

12:02 pm-11:20 am

2 stops16h 18m

$765

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Wed 11/12

5:00 am-6:47 pm

2 stops20h 47m

Denver Intl

Wed 11/19

7:10 am-11:20 am

2 stops21h 10m

$765

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Wed 11/12

11:05 am-11:18 pm

1 stop19h 13m

Denver Intl

Wed 11/19

12:05 pm-8:55 am

1 stop13h 50m

$766

LisbonDenver

LIS - DEN

LISDEN

Lisbon Humberto Delgado

Tue 11/18

10:50 am-5:50 pm

3 stops38h 00m

$426

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/28

Showing 1-10 of 19 results
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Compare providers for flights from Lisbon to Denver

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 Lisbon to Denver in September.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
Thrive TravelPrice Accuracy3 starsTrust Score*1 star

*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 Lisbon-Denver flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Lisbon-Denver flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Lisbon-Denver flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Lisbon-Denver 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 Lisbon-Denver 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 Lisbon to Denver

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

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

Use this chart to determine the optimal time to book a round-trip flight from Lisbon to Denver. Price data was last updated on September 26, 2025.

To ensure you get the cheapest price possible for a flight from Lisbon to Denver, you should look to book at least 42 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, October is the cheapest month in which you can book a flight from Lisbon to Denver (average of $197). Flying from Lisbon to Denver in March is currently the most expensive (average of $278). 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.

How much does it cost to fly round-trip from Lisbon to Denver?

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 September 29, 2025.
Get a feel of what it's like to fly with Delta, United Airlines, and British Airways from Lisbon to Denver by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,964 reviews

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Delta
8.0
Very good
7,964 reviews
Delta
8.0
Very good
7,964 reviews

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
United Airlines
7.4
Good
8,924 reviews
Delta
8.0
Very good
7,964 reviews

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
British Airways
6.7
Okay
7,406 reviews
Delta
8.0
Very good
7,964 reviews

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

Related info for your journey

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

    Airlines like British Airways and American Airlines fly from Lisbon to Denver in about 17h. The time it takes to get you to your destination can typically vary by up to 14h 39m. There are 4826 mi between Lisbon and Denver. This flight may include one or multiple stops.

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

    Currently priced at $749, British Airways will fly you from Lisbon to Denver and back. In addition to British Airways, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and United Airlines - these airlines can fly you to your destination from $758 and $766, respectively. British Airways is 21% cheaper than the average price of flights available within the next 90 days to this destination.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Lisbon to Denver (average of $197). Flying from Lisbon to Denver in March is currently the most expensive (average of $278). 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
Black Hawk
Westminster
Golden
Broomfield
Winter Park
Lakewood
Greeley
Lone Tree
Cripple Creek
Thornton
Silverthorne
Manitou Springs
Fort Morgan
Glendale
Wheat Ridge
Brighton
Longmont
Idaho Springs
Parker
Sterling

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Lisbon to Denver

See prices for flight routes from nearby airports that may be better suited for you.
Lisbon to Colorado Springs flights
Funchal to Denver flights

Top 3 airlines flying from Lisbon to Denver

Discover the top 3 airlines that operate flights from Lisbon 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 September 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$749Average$932FlexibilityNo cancel feeOn-time70%
DeltaCheapest$758Average$958FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$766Average$932FlexibilityNo cancel feeOn-time69%

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