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Cheap Flights from Denver International to Lisbon

Compare Denver International to Lisbon flight deals

Find the cheapest month or even day of the year to fly to Lisbon

Book the best Lisbon fare with no extra fees

Flight deals from Denver International to Lisbon

Looking for a cheap last-minute deal or the best return flight from Denver International to Lisbon? Find the lowest prices on one-way and return tickets right here.
Lisbon.R 4,348 per passenger.Departing Sun, 5 Oct.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Denver International on Sun, 5 Oct, arriving in Lisbon.Price includes taxes and charges.From R 4,348, select.
Lisbon.R 4,688 per passenger.Departing Sat, 13 Sep.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Denver International on Sat, 13 Sep, arriving in Lisbon.Price includes taxes and charges.From R 4,688, select.
Lisbon.R 5,612 per passenger.Departing Wed, 13 Aug.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Denver International on Wed, 13 Aug, arriving in Lisbon.Price includes taxes and charges.From R 5,612, select.
Lisbon.R 5,996 per passenger.Departing Mon, 3 Nov.One-way flight with Hawaiian Airlines.Outbound indirect flight with Hawaiian Airlines, departs from Denver International on Mon, 3 Nov, arriving in Lisbon.Price includes taxes and charges.From R 5,996, select.
Lisbon.R 6,578 per passenger.Departing Sat, 26 Jul.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Denver International on Sat, 26 Jul, arriving in Lisbon.Price includes taxes and charges.From R 6,578, select.
Lisbon.R 6,596 per passenger.Departing Wed, 3 Dec.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Denver International on Wed, 3 Dec, arriving in Lisbon.Price includes taxes and charges.From R 6,596, select.
Lisbon.R 8,213 per passenger.Departing Tue, 17 Mar.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from Denver International on Tue, 17 Mar, arriving in Lisbon.Price includes taxes and charges.From R 8,213, select.
Lisbon.R 9,260 per passenger.Departing Fri, 29 May.One-way flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departs from Denver International on Fri, 29 May, arriving in Lisbon.Price includes taxes and charges.From R 9,260, select.

Find the cheapest month to fly from Denver International to Lisbon

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Denver International to Lisbon flights are currently cheapest in October.
Jul
from R 6,578
Aug
from R 5,612
Sep
from R 4,688
Oct
from R 4,348
Nov
from R 5,996
Dec
from R 6,596
Jan
Find prices
Feb
Find prices
Mar
from R 8,213
Apr
Find prices
May
from R 9,260
Jun
from R 11,068

Denver International to Lisbon: Alternative routes

Compare routes from Denver International to Lisbon below. You may find an airport to fly into that's cheaper, faster, or easier than Lisbon.

Denver to Lisbon: Flight information

The things to know before you go.
Cheapest flight foundR 4,348
Cheapest month to flyOctober

Finding cheap flights from Denver International to Lisbon: Frequently asked questions

The best price we found for a return flight from Denver International to Lisbon is R 10,041. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Denver International to Lisbon. But we found flights with one or more stops from R 10,041.
As of July 2025, there are no flights flying from Denver International to Lisbon.
The cheapest month to fly from Denver International to Lisbon is usually August.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Denver International Airport to Lisbon Airport on Monday, 25 August 2025.
No airlines currently offer direct flights between Denver International Airport and Lisbon Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Lisbon but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Lisbon is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Aer Lingus offers the cheapest flight tickets to Lisbon.

Flying from Denver International Airport (DEN) to Lisbon Portela Airport (LIS): what you need to know

  • The timezone in Lisbon is UTC+0, which is six hours ahead of Denver.

  • For a smooth journey, arrive at the airport two hours ahead of international flights and an hour before domestic departures. This ensures you have enough time to board your DEN to LIS flight.

  • Flying during a peak month such as July? Public holidays and other high seasons can result in longer queues at security. Be extra cautious and get there up to four hours before an international flight and two hours before domestic departures.

  • Consider adding a stopover when booking your ticket from Denver International Airport to Lisbon Portela Airport. Just deselect 'Direct flights only' to break up your journey, or enjoy a detour to a new and interesting place. Check out these options between DEN and LIS:

    • Philadelphia International Airport

    • Logan International Airport

    • Newark Liberty International Airport

How to find the cheapest flights from Denver International Airport (DEN) to Lisbon Portela Airport (LIS)

  • Currently, R 4,348 is the lowest price we've seen for a one-way Denver International Airport to Lisbon Portela Airport flight. The best price for a return plane ticket is R 10,041. Remember that fares could change due to availability at the time of booking.

  • It's usually best to book in advance if you want to find cheap tickets from DEN to LIS. That's because airlines change prices based on demand, which tends to increase closer to the date of departure.

  • Finding cheap flights from Denver International Airport to Lisbon Portela Airport is more likely if you can be flexible with your travel plans. Use the 'Whole month' tool to see the lowest fares across the month and snap up a great deal.

  • Finding cheap flights from DEN to LIS is easy with Price Alerts. All you need to do is create one of these automatic alerts and we'll get in touch as soon as a new deal comes up.

  • Tailor your flights using filters. Pick your ideal departure and arrival times, airlines and total journey duration. You can also sort the results by 'Best,' 'Cheapest' or 'Fastest' flights from Denver International Airport to Lisbon Portela Airport.

Handy information about Denver International Airport (DEN)

  • DEN is located at 8500 Pena Boulevard.

  • Denver International Airport gets high marks for on-time performance. 80.23% of flights that depart DEN arrive at their destination without delay.

  • To reach Denver International Airport from central Denver, it'll take about 35 minutes if you're going by car. Of course, this depends on traffic. It's approximately 40 kilometres from the airport to the city centre.

  • The journey on public transport takes roughly 1 hour 30 minutes.

  • Booking a hotel room for the night can take the stress out of getting to the airport on time. If you're looking for a place to stay before your flight from Denver International Airport to Lisbon Portela Airport, take a look at Baymont by Wyndham Denver International Airport. It's a quick drive from DEN.

Arriving at Lisbon Portela Airport (LIS)

  • Book a hotel near LIS if you have a late Denver International Airport to Lisbon Portela Airport flight. Pick one of these accommodation options and avoid the hassle of a long transfer:

  • Grab a Lisbon Portela Airport rental car and explore Lisbon and beyond with your own set of wheels. Klass Wagen, Goldcar and OK Mobility are popular outlets to choose from here.

  • Secure the lowest price by booking your vehicle from Lisbon Portela Airport around two weeks before your departure date.

Getting from Lisbon Portela Airport (LIS) to central Lisbon

  • From Lisbon Portela Airport, Lisbon is approximately 10 kilometres away. It takes around 20 minutes to reach the centre by car.

  • It takes around 1 hour if you're travelling on public transport.

When to fly to Lisbon Portela Airport (LIS)

  • June is the busiest month for flights from Denver International Airport to Lisbon Portela Airport. To avoid the crowds, visit Lisbon in January.

  • The warmest month in Lisbon is August, with the temperature ranging between 16ºC (61ºF) and 29ºC (84ºF). Lock in your flights from Denver International Airport to Lisbon Portela Airport in this month if this is the kind of weather you like.

  • Search for cheap tickets from DEN to LIS in January if you want to travel in cooler conditions. Temperatures are at their lowest then, ranging between 8ºC (46ºF) and 16ºC (61ºF) on average.

Explore more of Portugal

  • Lisbon is always a good idea, but there are so many other parts of Portugal just waiting to be discovered. About 274 kilometres north of Lisbon, a trip to Porto will keep you on the go. Check out popular attractions like Livraria Lello, Ribeira District and The Douro River.

  • If you're interested in discovering another major destination in Portugal, head for Amadora, roughly 8 kilometres north-west of Lisbon. Jardim Porta do Viveiro Alfragide, Jardim Caracol do Victor Alfragide and Jardim e estatua Eduardo Jorge are among the biggest draws.

Plan the rest of your trip from Denver to Lisbon

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.