$276 Cheap Flights from Denver (DEN) to Lisbon (LIS)

View $276 flight on Wed, Oct 21, 2026Opens in a new window

Popular airlines from Denver Intl. Airport (DEN) to Humberto Delgado Airport (LIS)

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 30% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Denver to Lisbon (DEN-LIS)

Prices were available within the past 7 days and start at $276 for one-way flights and $582 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Brussels Airlines
Mon, Jan 18 - Tue, Jan 26
DEN
Denver
LIS
Lisbon
$582 Roundtrip, found 4 days ago
$582
Roundtrip
found 4 days ago
Select Brussels Airlines flight, departing Mon, Jan 18 from Denver to Lisbon, returning Tue, Jan 26, priced at $582 found 4 days ago
American Airlines
Mon, Jan 18 - Tue, Jan 26
DEN
Denver
LIS
Lisbon
$589 Roundtrip, found 4 days ago
$589
Roundtrip
found 4 days ago
Select American Airlines flight, departing Mon, Jan 18 from Denver to Lisbon, returning Tue, Jan 26, priced at $589 found 4 days ago
Lufthansa
Mon, Dec 28 - Tue, Jan 19
DEN
Denver
LIS
Lisbon
$591 Roundtrip, found 3 days ago
$591
Roundtrip
found 3 days ago
Select Lufthansa flight, departing Mon, Dec 28 from Denver to Lisbon, returning Tue, Jan 19, priced at $591 found 3 days ago
Virgin Atlantic
Sun, Nov 1 - Wed, Nov 11
DEN
Denver
LIS
Lisbon
$601 Roundtrip, found 6 days ago
$601
Roundtrip
found 6 days ago
Select Virgin Atlantic flight, departing Sun, Nov 1 from Denver to Lisbon, returning Wed, Nov 11, priced at $601 found 6 days ago
British Airways
Tue, Mar 17 - Wed, Apr 15
DEN
Denver
LIS
Lisbon
$646 Roundtrip, found 2 days ago
$646
Roundtrip
found 2 days ago
Select British Airways flight, departing Tue, Mar 17 from Denver to Lisbon, returning Wed, Apr 15, priced at $646 found 2 days ago
Iberia
Mon, Apr 20 - Tue, May 5
DEN
Denver
LIS
Lisbon
$647 Roundtrip, found 2 days ago
$647
Roundtrip
found 2 days ago
Select Iberia flight, departing Mon, Apr 20 from Denver to Lisbon, returning Tue, May 5, priced at $647 found 2 days ago
United
Tue, Oct 27 - Tue, Nov 10
DEN
Denver
LIS
Lisbon
$649 Roundtrip, found 3 hours ago
$649
Roundtrip
found 3 hours ago
Select United flight, departing Tue, Oct 27 from Denver to Lisbon, returning Tue, Nov 10, priced at $649 found 3 hours ago
KLM
Wed, Mar 18 - Thu, Apr 16
DEN
Denver
LIS
Lisbon
$653 Roundtrip, found 4 days ago
$653
Roundtrip
found 4 days ago
Select KLM flight, departing Wed, Mar 18 from Denver to Lisbon, returning Thu, Apr 16, priced at $653 found 4 days ago
Air Canada
Tue, Oct 27 - Tue, Nov 10
DEN
Denver
LIS
Lisbon
$664 Roundtrip, found 3 hours ago
$664
Roundtrip
found 3 hours ago
Select Air Canada flight, departing Tue, Oct 27 from Denver to Lisbon, returning Tue, Nov 10, priced at $664 found 3 hours ago
Delta
Tue, Jan 12 - Tue, Jan 26
DEN
Denver
LIS
Lisbon
$668 Roundtrip, found 6 hours ago
$668
Roundtrip
found 6 hours ago
Select Delta flight, departing Tue, Jan 12 from Denver to Lisbon, returning Tue, Jan 26, priced at $668 found 6 hours ago

The Annual Vacation Sale

Members save up to 40% on hotels and homes. Plan this year’s big trip and save.
Book now

Alternative airports near Lisbon

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Humberto Delgado LIS. Cheapest option available. Flights from $916
LIS
Humberto Delgado
Cheapest
Flights from $916

Frequently asked questions

How much does a flight from Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado) cost?
You can find cheap one-way flights from $276 and cheap return flights from $582 Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado) with Expedia. One-way flights generally range between $458 and $4746, and roundtrip flights usually range from $729 to $5243. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado)?
The cheapest month to fly from DEN to LIS is January when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado)?
Enter DEN to LIS and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado)?
WestJet is one of the cheapest airlines offering connecting flights from Denver, CO (DEN) to Lisbon (LIS), with round-trip tickets starting from around $1,439 with a layover in Calgary Intl. (YYC). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado)?
To find a cheap flight from Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado)?
The earliest flight from Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado) typically departs at around 12:20 AM local time, operated by American Airlines. This is a seasonal service active in March, giving you the chance to maximize your time in Lisbon. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado)?
For flights from Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado), the most popular departure times are from 9am to 12pm. This time window accounts for around 26% of total traffic. Many major carriers, including United Airlines, Air Canada, and Delta Airlines, offer flights during this period. This timing works well for travelers looking to maximize their time in Lisbon upon arrival.
How long does it take to fly from Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado)?
A flight from DEN to LIS with a layover takes around 13 hours 50 minutes, with the route covering approximately 4,831 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado)?
Business class is available on flights from DEN to LIS. Airlines that offer business class service on this route include:

  • Lufthansa
  • British Airways
  • United Airlines
  • Air Canada
  • Air France
  • Delta Air Lines
  • American Airlines
  • Turkish Airlines
  • Icelandair
  • Edelweiss Air

First class is available with United Airlines and Lufthansa.
How do I earn miles on a Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado) flight with Expedia?
It's easy to earn miles on a Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Lisbon from Denver Intl. (DEN)?
From Denver Intl. (DEN), you can fly into Humberto Delgado (LIS) to reach Lisbon. Some flights may connect through major hubs like O'Hare Intl. (ORD), Dallas-Fort Worth Intl. (DFW), Hartsfield-Jackson Atlanta Intl. (ATL) before reaching Lisbon. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado) at the last minute?
Typically, booking a last minute flight from Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado) flight and hotel package?
Securing a Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado) Lisbon Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado)?
If you booked your Denver, CO (DEN-Denver Intl.) to Lisbon (LIS-Humberto Delgado) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Denver Intl.
Destination airport
Humberto Delgado
Airlines serving
Aer Lingus, Air Canada, Air Europa, Air France, American Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Roundtrip price
$582
Distance
4830 mi

Book with confidence

Denver to Lisbon Flights

The cheapest times to fly from Denver to Lisbon

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Denver to Lisbon are during the month of January. You can find some of the cheapest flights from Denver to Lisbon with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Denver to Lisbon

Sunday is one of the best days to book for cheap flights from Denver to Lisbon: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Denver to Lisbon

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Denver to Lisbon in 2026. You can also book with separate airlines for your outbound and return journeys, from $276 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Denver to Lisbon flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Denver to Lisbon airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Denver to Lisbon Flights

*Flight schedules are subject to change.

Explore a world of travel with Expedia

*Available to One Key members.