$247 Find Cheap Flights from Denver to Portugal

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Portugal departing on 4/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Denver to Portugal

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Lisbon
Lisbon1 stop$576
Porto
Porto1 stop$570
Faro
Faro2 stops$553
Ponta Delgada
Ponta Delgada2 stops$761
Funchal
Funchal2 stops$596
Lajes
Lajes2 stops$1,842
Lisbon
Lisbon1 stop$576
Porto
Porto1 stop$570
Faro
Faro2 stops$553
Ponta Delgada
Ponta Delgada2 stops$761
Funchal
Funchal2 stops$596
Lajes
Lajes2 stops$1,842

Book Cheap Denver to Portugal Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to Portugal that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Denver to Portugal

Tue, Feb 24 - Tue, Mar 3
SWISS Logo
1:30 pm - 1:50 pm
DEN
-
FAO
17h 20m
2 stops
SWISS Logo
7:00 pm - 7:48 pm
FAO
-
DEN
31h 48m
2 stops
$553SWISS
Tue, Feb 24 - Fri, Mar 6
KLM Logo
11:33 am - 6:05 pm
DEN
-
FAO
23h 32m
2 stops
KLM Logo
9:15 am - 12:23 am
FAO
-
DEN
22h 08m
2 stops
$554KLM
Mon, Mar 9 - Mon, Mar 16
Lufthansa Logo
5:20 pm - 12:50 pm
DEN
-
OPO
13h 30m
1 stop
Lufthansa Logo
4:15 pm - 5:00 pm
OPO
-
DEN
30h 45m
1 stop
$570Lufthansa
Tue, Apr 21 - Tue, May 5
Iberia Logo
10:36 am - 11:45 am
DEN
-
OPO
18h 09m
2 stops
Iberia Logo
8:20 am - 11:59 pm
OPO
-
DEN
22h 39m
2 stops
$571Iberia
Tue, Apr 14 - Fri, Apr 24
British Airways Logo
5:10 pm - 11:00 pm
DEN
-
LIS
22h 50m
2 stops
British Airways Logo
11:05 am - 10:35 pm
LIS
-
DEN
18h 30m
2 stops
$578British Airways
Wed, Mar 11 - Wed, Mar 18
United Airlines Logo
7:45 am - 11:40 am
DEN
-
OPO
21h 55m
2 stops
United Airlines Logo
6:00 am - 10:33 am
OPO
-
DEN
34h 33m
2 stops
$579United Airlines
Wed, Apr 8 - Tue, May 5
British Airways Logo
6:40 pm - 11:15 pm
DEN
-
LIS
21h 35m
1 stop
British Airways Logo
6:45 pm - 4:30 pm
LIS
-
DEN
28h 45m
1 stop
$580British Airways
Tue, Mar 17 - Wed, Mar 25
United Airlines Logo
12:33 pm - 8:10 am
DEN
-
LIS
13h 37m
1 stop
United Airlines Logo
11:55 am - 6:40 am
LIS
-
DEN
24h 45m
2 stops
$582United Airlines
Wed, Mar 11 - Wed, Mar 18
Lufthansa Logo
6:45 pm - 3:25 pm
DEN
-
OPO
14h 40m
1 stop
Lufthansa Logo
6:00 am - 5:00 pm
OPO
-
DEN
17h 00m
1 stop
$585Lufthansa
Sun, May 17 - Fri, May 22
Delta Logo
5:40 pm - 10:00 pm
DEN
-
OPO
21h 20m
1 stop
Delta Logo
5:00 am - 11:41 pm
OPO
-
DEN
25h 41m
2 stops
$612Delta
Booking Insights

KAYAK's insights & trends for Denver to Portugal flights

Get data-powered insights and trends into flights from Denver to Portugal to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Denver to Portugal?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Denver to Portugal, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Denver to Portugal is January, when tickets cost $626 (return) on average. On the other hand, the most expensive months are June and December, when the average cost of round-trip tickets is $1,287 and $1,134 respectively.

How far in advance should I book a flight from Denver to Portugal?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Denver to Portugal, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Denver to Portugal, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$247
Most popular time to fly with an average 1% increase in price.
Flight from Denver to Lisbon

FAQs - booking Portugal flights

  • I’m flying from Denver to Northern Portugal. What airport should I land at?

    Passengers headed from Denver to the northern region of Portugal should consider looking for flights that land at Francisco Sá Carneiro Airport, just outside the city of Porto. Lufthansa provides a one-stop layover that goes to Munich Franz Josef Strauss Airport (MUC), while a United Airlines one-stop layover goes to Newark Liberty International Airport (EWR).

  • What airport should I use when flying to the Tagus Valley region?

    If you’re flying from Denver International Airport to Portugal to visit the Tagus Valley region, then consider booking flights to Humberto Delgado Airport, just outside the nation’s capital Lisbon. American Airlines offers a layover that stops at Philadelphia International Airport (PHL), while United Airlines has a one-stop layover that goes to Newark Liberty International Airport. In addition, British Airways provides a layover flight that makes one stop at London Heathrow Airport.

  • I’d like to visit the southernmost region of Portugal. What airport should I fly to?

    The Algarve region in the southern part of Portugal is well-known for its beaches. To get there from Denver International Airport, look for layover flights to Faro International Airport. Aer Lingus has a one-stop layover that goes to Dublin Airport (DUB), while Lufthansa has a one-stop layover that goes to Frankfurt Airport (FRA). In addition, United Airlines offers a layover that makes one stop at Newark Liberty International Airport.

  • Where should I fly to when visiting São Miguel in the Azores?

    São Miguel is the largest island in the Azores region of Portugal. If you’re headed there from Denver, consider looking for layover flights to Aeroporto João Paulo II (PDL), located near the capital city of Ponta Delgada. JetBlue and Azores Airlines offer a combined one-stop layover that goes to Boston Logan International Airport (BOS), as well as a slightly faster one-stop layover that goes to New York John F Kennedy International Airport (JFK).

  • How does KAYAK find such low prices on flights from Denver to Portugal?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Denver to Portugal.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Denver to Portugal?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Denver to Portugal is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Denver to Portugal?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Denver to Portugal with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Denver to Portugal?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Denver to Portugal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Portugal

  • United States citizens with a valid passport that has two blank pages and at least three months of validity past their departure date can travel to Portugal for up to 90 days, without needing a visa.
  • Headed to the islands of Madeira in Portugal? If so, consider looking at layover flights from Denver Airport to Cristiano Ronaldo Madeira International Airport (FNC). British Airways provides one-stop layovers that go to London Heathrow Airport (LHR).
  • The Beiras region of central Portugal doesn’t have any airports itself. However, it’s roughly halfway between Francisco Sá Carneiro Airport (OPO) in Porto to the north and Humberto Delgado Airport (LIS) in Lisbon to the south, so layover flights to either airport are convenient.
  • Denver International Airport (DEN) features a variety of accessible services and facilities for passengers with reduced mobility. These include accessible parking spaces, restrooms, elevators, wheelchairs upon request, and recognition of hidden disabilities through the Sunflower Lanyard program.
  • Although there are no airports in the Alentejo region of southern Portugal, Lisbon Humberto Delgado Airport is to the northwest and Faro International Airport (FAO) is to the south. Depending on where you’d like to go, layover flights to either airport will put you within a car ride or bus ride to the region.

Reviews of the top 5 airlines serving from Denver to Portugal

 
Need help choosing which airline to fly with from Denver to Portugal? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9282 reviews
7.1Entertainment
6.6Food
8.1Crew
7.3Comfort
7.7Boarding
Airline reviews

Sitting on the runway after we land for almost two hours! Not sure if we should blame United or Just Dumpy Vance.

2.0 MediocreSid, Dec 2025
DEN - BZN
Read more United Airlines reviews

Sitting on the runway after we land for almost two hours! Not sure if we should blame United or Just Dumpy Vance.

Flight was late - I was downgraded from first class to coach

United overall experience is great these days. Airport experience was very organized. Staff on flight were great. App and information as good as it gets.

Great smooth flight. Had a seating change, but that was an improvement. Thanks United Airways Crew.

Flight was good but there are way to many announcements for credit cards etc.

Crew seemed a bit cranky. No seatback screens. But boarding was efficient and on time and we arrived early.

See previous note about the passenger in Denver who threw my husband's bag out of the overhead bin in order to maker room for his own. And the flight attendant back up the new passenger.

Terrible. They wouldn't allow me on my flight on the 14th..

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

After arriving in Istanbul, the transit information on the electronic board showed a tight departure time, and the gate changed in the middle, making it difficult to make it on time.

Typically good service onboard but baggage delay in airport was significant

My, Syed Zawar Hussein Shirazi frequently flyer membership number was not included on my boarding pass from O’Hare to Istanbul despite my reminder to the attendant at check in. Further she forgot to give me my boarding pass form Istanbul to Lahore and she needs to improve her customer service, please 🙏

Everything about that day was great I was happy with how things went as a first time traveling with the airline thank you for all that you’ve doing by taking us there to our various destinations thanks.

They oversold the tickets by one which was my ticket so I didn’t have a ticket till last second

Not good. I was supposed to be in Mint but got in economy class

Service was slow and checked bag was off last evening when flying business

Turkish Airline canceled our tickets in the very last minute, with our luggage and everything else, all prepared and good to go. It’s clear that they sold the tickets for better money to someone else. Bad, Bad, Bad business!!!

Awful seating. Bad food. Staff only have one bottle of water and no cans.

it was like a banya -so hot... They did provide a great experience with special food. one toilet broke midflight In general it was a peaceful and relaxing flight - for business class it was good.

The last 3 hours it was freezing cold in row 56. Multiple people had their winter coats on and were utilizing the blankets provided by the airline. I also did not have easy access to figure out how to book my food allergy and advance for my meals. Most of everything I received was something I couldn't eat. This needs to be made more accessible. Also, I'm 5'10 which is the average height of the American male. I flew from Philadelphia to Toronto and then to Tokyo and the seats were absolutely unbearable. For that long of a flight it is impossible to get comfortable when doing anything. Flights need to have more space and stop prioritizing costs over people.

Again, we were rerouted all the way to Zurich and had a longer journey than expected.

Was delayed at every point/ connection. Luggages missing for 5days. Had no medications for diabetes and high B/p. when bags where finally delivered on the 30th, the insulin and ozempic were no longer patent, as the ice pack had since dissolved and the authenticity of the med is now questionable, since they must be refrigerated. Please have them refund my bag fees. I should sue them for all the inconveniences caused to me.

The plane was delayed substantially due to a mechanical problem, that being said, the airline was very fair with providing a meal coupon for us. I would rather arrive late on a mechanically sound plane than the alternative. The food served in the plane was just awful, however and I recommend a new catering company.

I waiting for 2 hrs to retrieve my luggage. Didn't get home till 3am.

The flight left late and I didn’t get a glass of bubbly upon boarding (which I’m used to when booking business class on other flights), but otherwise it was a pleasant flight with lovely, helpful crew members and I enjoyed my meal.

Flight cancellations, delays, mass confusion and disorganization! That’s Air Canada for you, nothing new. I would have chosen a different airline if it were an option, and Air Canada continues to prove they don’t care about their customers.

everything was fine. but paying for 1 piece of check-in luggage and denying passengers to board with carry-on luggage which by air line's standards does not fit is not acceptable. when one travels for a longer time one needs to have some essentials

Couldn't fit knees, only 1 toilet working, didn't get anything to drink cause the stewards were not able to get to us

Flight was canceled for a reason they knew hours before but did not mention. Next the gate chnage from 37 to 38 at least 10 times. Ridiculous.

Excellent service; they helped me reschedule so I can fly in an earlier flight

I had a good comfortable seat. There was nearly an hour delay. There was an accident with the champagne, but I was well compensated. These things happen sometimes.

Service and food were excellent. Incredibly friendly and competent staff. Flight was delayed over and hour and I had to run between terminals to get my connecting flight.

Missed it by a couple minutes and couldn’t find an alternative flight so had to spend the night in DC and after much shuffling from 1 airline to another managed to get a United to Frankfurt.

There were only 2 toilets and one of them did not work in business class. We are not allowed to cross classes so had to wait in line to use the toilets!! The entertainment touch display was finicky and did not work all the time.

We missed our flight. There was not enough time built into the layover to get through immigration, customs, bagclaim, bag rechecking, and the long trip to another terminal and gate. Kayak really screwed up. We took the bus up to Wisconsin and then were picked up in Brookfield by private car. It was lucky we didnt miss the last bus out.

I tried both on line and by calling the Customer Service line to arrange for a special meal as i have food intolerances. I was under the impression from your service representative that I was successful. I was not. I cannot eat spicy foods and get very ill if i eat bell peppers. I could not eat either menu choice and no special meal was actually ordered. ( your representative tried to order it for a flight that did not have meal service!!! - found this out later). Your wonderful cabin crew managed to put together a fruit, salad, roll and cheese tray for me so I had something to eat. WHY WOULD YOU SERVE SPICY FOOD, WITH NO MILDER OPTION,ON AN INTERNATIONAL FLIGHT???

Crew was professional and great, flight was clean. However food was pathetic. I ordered a Hindu meal assuming no meat but they served chicken. Need to be very specific- Hindu meal should be categorize as Vegetarian - no meat or egg. Or it should be specific that we are serving meat.

Late flight Delays Poor service Poor staff Worst airline ever

Ground staff and cabin crew were excellent. Flight was perfectly on time. Zero issues.

We waited at BOS at the gate for an hour and couldn’t get a drink or anything. Once in the air the service, food and ride was excellent.

My enetertainmnet screen was broken. Lost my bags. Almost missed my flight do to connection issues with (despite a request) ZERO help from crew. Food was edible. Potatoes pretty good even

Our Jackson, Mississippi to Dallas Fort Worth flight was delayed on 1/19/26.. This was changed to Jackson to Charlotte in the last minute because of this delay. This started some kind of disconnect between American Airlines and British Airways bookings. We could not go past the passport control in London Heathrow. I had to go to the counter and waited for more than 30 minutes to get a new boarding pass. Problems did not end there. Somehow our entire return flight was canceled by someone. I had to make several phone calls over several days to fix the problem – this was not easy from India. Looks like there was some kind of disconnect between two airlines or some agent did not do it right. I’m anxious to know what went wrong.

The issue was not with BA it was with the link yoiu sent fopr booking the flight

Loved the boarding option from Business class lounge, experience on flight was excellent, plenty of good food choices

Getting the boarding passes between the BA and AA apps was very clunky.

The airline was not clear about a new departure time so we got to the airport early anyway. The flight left early which was great because of weather. The check in process was very easy and staff were friendly and helpful. The crew was great and our flight was very good.

Awful it always is unfortunately is the only way to fly direct to london

I travelled in business class and was disappointed by lack of service, curt and borderline rude time of the crew and to top it off, all of my luggage was delayed. It was like pulling teeth to even report the missing luggage and recover it the next day from the airport.

Plane was extremely delayed, but not all of it was BA fault (some was). Worst part was lack of room - this had as much space as an Allegiant flight. I thought transatlantic usually gave you an extra inch or two, but not this one. Entertainment system sporadically worked and didn’t have great options. Overhead bins are old and tiny, not as good as aunties new planes.

Everything you need to know for your flight from Denver to Portugal

Information on your arrival and departure airports