$334 Find Cheap Flights from Portugal to Denver

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Denver departing on 5/7. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Denver

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Denver, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to Denver, as well as popular online travel agencies
Travelers love KAYAK
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Everything you should know

Cheapest round-trip
$683
Typical prices: $781-$958
British Airways
Wed 2/11Tue 2/17
LIS - DEN • 1 stop
Cheapest one-way
$358
Typical prices: $688-$807
Multiple Airlines
Thu 5/7
LIS - DEN • 2 stops
When to travel
February
Cheapest • 11% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Denver!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Portugal to Denver

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portugal to Denver 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 Portugal to Denver

Wed, Feb 11 - Tue, Feb 17
British Airways Logo
7:05 am - 3:30 pm
LIS
-
DEN
15h 25m
1 stop
British Airways Logo
5:25 pm - 2:45 pm
DEN
-
LIS
14h 20m
1 stop
$683British Airways
Sun, Feb 8 - Mon, Feb 23
Multiple Airlines Logo
5:25 pm - 9:45 am
LIS
-
DEN
23h 20m
1 stop
Multiple Airlines Logo
11:59 pm - 5:35 am
DEN
-
LIS
22h 36m
1 stop
$686Multiple Airlines
Wed, Feb 11 - Mon, Mar 9
American Airlines Logo
6:45 pm - 11:21 am
LIS
-
DEN
23h 36m
2 stops
American Airlines Logo
8:00 am - 12:05 pm
DEN
-
LIS
22h 05m
2 stops
$762American Airlines
Sat, Feb 7 - Mon, Feb 23
Multiple Airlines Logo
8:20 am - 11:16 pm
LIS
-
DEN
21h 56m
2 stops
Multiple Airlines Logo
5:25 pm - 2:55 pm
DEN
-
LIS
14h 30m
1 stop
$764Multiple Airlines
Thu, Feb 12 - Tue, Mar 17
American Airlines Logo
10:55 am - 8:14 pm
LIS
-
DEN
16h 19m
2 stops
American Airlines Logo
6:25 pm - 9:45 pm
DEN
-
LIS
21h 20m
1 stop
$765American Airlines
Wed, Feb 11 - Tue, Mar 10
British Airways Logo
11:05 am - 9:11 pm
LIS
-
DEN
17h 06m
1 stop
British Airways Logo
6:25 pm - 9:45 pm
DEN
-
LIS
21h 20m
1 stop
$766British Airways
Wed, Feb 18 - Thu, Mar 19
British Airways Logo
11:05 am - 9:36 pm
LIS
-
DEN
17h 31m
1 stop
British Airways Logo
2:10 pm - 9:05 am
DEN
-
LIS
12h 55m
1 stop
$767British Airways
Wed, Feb 11 - Sun, Mar 15
American Airlines Logo
8:20 am - 8:53 pm
LIS
-
DEN
19h 33m
2 stops
American Airlines Logo
7:05 am - 9:05 am
DEN
-
LIS
20h 00m
1 stop
$773American Airlines
Wed, Feb 11 - Wed, Mar 11
British Airways Logo
11:05 am - 9:11 pm
LIS
-
DEN
17h 06m
1 stop
British Airways Logo
2:10 pm - 8:55 am
DEN
-
LIS
12h 45m
1 stop
$775British Airways
Fri, Feb 27 - Thu, Mar 5
American Airlines Logo
8:20 am - 8:50 pm
LIS
-
DEN
19h 30m
2 stops
American Airlines Logo
2:20 pm - 9:05 am
DEN
-
LIS
11h 45m
1 stop
$781American Airlines
Booking Insights

KAYAK's insights & trends for flights to Denver

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

What is the cheapest month to fly to Denver?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to Denver, 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 to Denver is February, where tickets cost $853 on average for one-way flights. On the other hand, the most expensive months are July and April, where the average cost of tickets from Portugal is $1,121 and $1,051 respectively. For return trips, the best month to travel is February with an average price of $853.

Good to know

Low seasonJune
Cheapest flight$358
Best time to beat the crowds with an average 3% drop in price.
Flight from Lisbon to Denver

FAQs - booking Denver flights

  • How far is Denver Intl Airport from central Denver?

    Central Denver is 18 miles away from Denver Intl Airport.

  • What is the name of Denver’s airport?

    All flights to Denver land at Denver Intl Airport. The airport code is DEN,and it can also be referred to as Denver or Denver Intl.

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

    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 to Denver.

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

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

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

    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 to Denver 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 to Denver?

    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 to Denver up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • How many direct flights to Denver are there each week?

    Each week there are around 8,375 direct flights from within Portugal to Denver. The most common day for departures is Thursday, with 15% of flights taking off on this day.

Top tips for finding cheap flights to Denver

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Denver flight deals.

Reviews of the top 3 airlines serving from Portugal to Denver

 
See real verified KAYAK customer reviews for airlines flying to Denver. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Portugal to Denver. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to Denver? 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.
7.9
DeltaOverall score based on 8119 reviews
8.1Boarding
7.8Entertainment
7.2Food
7.9Comfort
8.5Crew
Airline reviews

It was last minute due to weather - considering - it was amazing! Good smiles, friendly staff and they were making sure we knew what was going on when and where.

10.0 ExcellentZebrina, Jan 2026
LGA - CAE
Read more Delta reviews

It was last minute due to weather - considering - it was amazing! Good smiles, friendly staff and they were making sure we knew what was going on when and where.

delta last minute gave me a boarding pass for a different flight with no confirmation that they were changing it

The service from the flight attendants were of supreme quality. They greeted and treated everyone with a wide smile. This is totally absent nowadays. Kudos to them!!!!

Excellent flight and got us around tough weather. Only issue was seat TV did not work and crew tried to reboot.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

was sitting in the jet bridge for 10 minutes in -20 degree weather waiting for my bag

Very convenient considering that is a non-stop flight, but the Aeromexico still has old model planes, so the entertainment was very poor and the space for carry-on luggage was very limited.

Flight taking off must have been behind, because there was no pre-departure drink for first class like normal. Also, person in front of mine’s seat got stuck in the as far back as it normally goes position for the whole flight even during landing, flight attendant unable to fix it. Gate was not empty when we arrived, but that is MSP’s fault since was overdue for push back, not Delta’s, so had to sit on tarmac for a while and international flight so then still had to go through customs. Flight crew was excellent throughout though!

Flight from MEX to ATL had to divert to Tampa. When we got off the plane, there were non directions on what to do. Nearly 30 minutes just standing around. Finally told to go through security with no boarding passes, and turned away. Then told to to go back. Took forever to leave Tampa for ATL. Missed my connection to Harrisburg.

This long-haul international flight was the most comfortable among any of the same kind of flight operated by an American-headquartered airline - second to none!

I just think it’s unfortunate that Airlines have completely abandoned the idea of serving any kind of decent or even real food on flights, not even on a four hour flight!? Those days are gone, I guess.

The flight was delayed by two de-icings. The seatbelt did not work correctly. It did not stay tight.

Hotter than Hades in August. Why, why do crews think that in the winter when we are already dressed for cold weather we need a cabin that is 82 degrees. Even the vents were blowing hot air.

Flight was delayed. De-icing took a while. When we landed had to wait for another plane to vacate our gate. Just an overall bad experience.

Not good - outbound flight was delayed and missed my connection even though I got to the gate after running through the airport - the agent would not let me on because the door was closed (flight had not left). There was no notification from United - overall experience was very disappointing. Additionally, I was downgraded from first class to coach on the alternative flight

United have really come back. Airport and boarding process is clear and good, app and information also very good

We Left Calgary 1/2 hour late and that made for a tight connection in Denver. After arriving everything was done to help us make our connection. That was a great effort. Thank You United

The entertainment available didn’t work for anyone on the flight. Long 6 hr flight with no entertainment option and the staff didn’t know until an hour into the flight when we made sure they knew about it. They had no way to fix it.

Late FA meant slow boarding. WiFi did not work. I’m a medium plus sized passenger. The seatbelt was for the first time ever barely fitting. And we delayed on the tarmac 40 min

My husband and I had boarded the flight from Denver to Chicago, and one of the last passengers to get on the plane opened the overhead bin above my husband's seat and threw his bag out of the bin to make space for his own. He said, "Mine is bigger!" The flight attendant supported the new passenger. They didn't care that my husband has two artificial knees and must have the foot room in front of his seat to be able to fit his legs in -- and to be able to stand, much less walk, at the end of the flight. I have never seen this happen before, and it was a disaster.

My touch screen at my seat wasn't working, the films BA advertised on the website for this flight were not available, and the plane was a little dated, food was good and the staff were good, just let down by the aircraft facilities.

Did not like the seating configuration at all with 2+3+2 in business class. Lacking total privacy and comfort

The flight crew was kind, flexible, and accommodating. The seats on the plane were extremely uncomfortable.

Check-in experience, for business call please provide a premium experience

Lost my luggage, ran out of food choices in business class, ground crew was completely unapologetic.

Excellent. The crew and flight were great. Checking in was easy and everyone was very helpful.

Entertainment devices on A380 need to be fixed, the seats might do with updates.

Everything. Employees offered to help me because I had to use a cane.

Check-in and boarding were great. On flight staff were rude and disrespectful. Paid for extra room and found it incredibly cramped. Bathrooms kept in poor condition. Overall negative experience.

Great seat in premium economy, great food and drinks throughout lots of in flight entertainment. 1 hour 40 min delayed flying out , 2 1/2 hour wait at passport control in tampa

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Westminster
Lakewood
Dillon
Broomfield
Englewood
Greenwood Village
Central City
Lone Tree
Wheat Ridge
Limon
Brighton
Fort Morgan
Evergreen
Erie

Everything you need to know for your flight to Denver

Information on the airport you'll fly into in Denver