$353 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 1/10. 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
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Everything you should know

Cheapest round-trip
$864
Overall average: $941
Lufthansa
Mon 11/17Sun 11/30
LIS - DEN • 1 stop
Cheapest one-way
$353
Typical prices: $745-$1,199
Multiple Airlines
Sat 1/10
LIS - DEN • 3 stops
When to travel
February
Cheapest • 15% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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

Mon, Nov 17 - Sun, Nov 30
Lufthansa Logo
5:00 am - 4:00 pmLIS-DEN
18h 00m1 stop
Lufthansa Logo
4:05 pm - 10:15 amDEN-LIS
11h 10m1 stop
$864Lufthansa
Find Deal
Mon, Nov 17 - Sun, Nov 30
Lufthansa Logo
5:00 am - 4:00 pmLIS-DEN
18h 00m1 stop
Lufthansa Logo
4:05 pm - 10:15 amDEN-LIS
11h 10m1 stop
$865Lufthansa
Find Deal
Fri, Nov 14 - Thu, Nov 27
Air France Logo
5:30 am - 5:51 pmLIS-DEN
19h 21m2 stops
Air France Logo
11:49 am - 8:00 amDEN-LIS
13h 11m1 stop
$871Air France
Find Deal
Fri, Nov 14 - Thu, Nov 27
Multiple Airlines Logo
5:30 am - 5:51 pmLIS-DEN
19h 21m2 stops
Multiple Airlines Logo
10:39 am - 8:55 amDEN-LIS
15h 16m2 stops
$872Multiple Airlines
Find Deal
Mon, Nov 17 - Sun, Nov 30
Delta Logo
5:00 am - 7:31 pmLIS-DEN
21h 31m2 stops
Delta Logo
12:02 pm - 3:10 pmDEN-LIS
20h 08m2 stops
$873Delta
Find Deal
Mon, Nov 17 - Sun, Nov 30
Delta Logo
5:00 am - 6:47 pmLIS-DEN
20h 47m2 stops
Delta Logo
12:02 pm - 3:10 pmDEN-LIS
20h 08m2 stops
$875Delta
Find Deal
Sat, Dec 20 - Sun, Jan 4
British Airways Logo
10:40 am - 11:26 pmLIS-DEN
19h 46m1 stop
British Airways Logo
2:45 pm - 2:50 pmDEN-LIS
17h 05m2 stops
$881British Airways
Find Deal
Mon, Nov 17 - Sat, Nov 29
United Airlines Logo
5:00 am - 4:00 pmLIS-DEN
18h 00m1 stop
United Airlines Logo
12:59 am - 10:15 amDEN-LIS
26h 16m1 stop
$890United Airlines
Find Deal
Sat, Dec 20 - Mon, Jan 5
British Airways Logo
10:40 am - 9:44 pmLIS-DEN
18h 04m1 stop
British Airways Logo
7:00 am - 9:05 amDEN-LIS
19h 05m1 stop
$891British Airways
Find Deal
Fri, Dec 19 - Mon, Jan 5
United Airlines Logo
11:55 am - 10:06 pmLIS-DEN
17h 11m2 stops
United Airlines Logo
1:47 pm - 8:10 amDEN-LIS
11h 23m1 stop
$917United Airlines
Find Deal
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 $821 on average for one-way flights. On the other hand, the most expensive months are July and June, where the average cost of tickets from Portugal is $1,194 and $1,063 respectively. For return trips, the best month to travel is February with an average price of $821.

Good to know

Low seasonJune
Cheapest flight$353
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly with an average 2% increase 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.

  • What is the cheapest day to fly to Denver?

    Based on KAYAK data, the cheapest day to fly to Denver is Wednesday where tickets can be as cheap as $803. On the other hand, the most expensive day to fly is Friday, where prices are $1,169 on average.

  • 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.

  • What is the cheapest time of day to fly to Denver?

    The cheapest time of day to fly to Denver is generally in the morning, when flights cost $951 on average. The most expensive time of day to fly to Denver is generally in the morning, which is peak travel time and where the average cost of a ticket is $951.

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

    Each week there are around 7,730 direct flights from within Portugal to Denver. The most common day for departures is Monday, 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 7993 reviews
7.9Entertainment
8.2Boarding
7.3Food
8.5Crew
7.9Comfort
Airline reviews

DELTA does a terrific job making sure you are well taken care of during the flight, gives you assurance before the flight through numerous email notifications about your upcoming flight & lastly good follow up after the flight making sure your needs were mat. It has been, is & will continue to be my carrier of choice in all my future travels. Good Job DELTA

10.0 ExcellentAnonymous, Oct 2025CDG - SEA
Read more Delta reviews

DELTA does a terrific job making sure you are well taken care of during the flight, gives you assurance before the flight through numerous email notifications about your upcoming flight & lastly good follow up after the flight making sure your needs were mat. It has been, is & will continue to be my carrier of choice in all my future travels. Good Job DELTA

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

Seats comfortable, service and food very mediocre, staff not very attentive, worse than many other our flights with Delta.

Overall good experience; however, there was one flight attendant who was rather rough compared to everyone else. Everything else was good: entertainment, food. Delta keeps on delivering! Thank you!

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Crew blocked exits to front of ship with galley carts. Also split five person family apart on international flight without fixing.

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

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.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

Had to cancel first flight because Airporter Bus took over 3 hrs to get to airport which resulted in an extra $378 dollar fare . Is there anyway I can be reimbursed for initial fare since it was not my fault? Sent from my iPhone EJ Ledet

Excellent flight. Boarding was efficient and departure was on time. Smooth flight with on time arrival. Deplaning was also efficient.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

Very rough getting into denver. my kid threw up it was so rough.

Not my definition of first class. No leg room and barely any recline. The food was good. The crew was great. The comfort for the price I paid for London to Cairo was highway robbery. The Wi-Fi didn't work for me either.

There might be more food options for people who can't eat so much starch/sugar/bread/rice. Meat, cheese, walnuts/pecans for snack, maybe jerky or other kinds of meat-based snacks would be better than bread and rice and sweets. I had an extra chardonnay, which was fine. The entertainment was great.

Unfortunately, my flight was cancelled because of some sort of emergency over the Atlantic and had to return to London. While I think British Airways made every effort to mitigate the situation, I must say it was still pretty unpleasant. I do appreciate the fact, however, that British Airways put my safety first…and I think the effort to correct a bad situation was very sincere. But I think the process might be handled better in future.

Crew service was poor and very little difference between premium economy and economy. Disappointed.

My bags never made it on the flight and I now have to wait for them to arrive hopefully tomorrow. You can’t even track your bags in the app to see where they are since they didn’t arrive. You have to file a claim and then wait for them to inform you when you will receive your bag. We were already delayed for an hour due to baggage so I don’t understand how my bag didn’t make the flight.

One of the worst experience given the middle seat even asked for the change no one honored,boarded at the end and overall one of the worst experience

It was good although our flight to the UK was cancelled and rescheduled for two days later. This was after we were already seated on the plane. We missed the first leg of our trip. BA did put us up at a hotel and paid for our meals but we lost our hotel costs in Glasgow.

The crew was very nice and pleasant. We were very reluctant to book our flight with British Airlines because we had bad experience with their flight attendants on the previous trips, they were rude and not helpful.

I am a 25+ years American Airlines member. British Airways is simply above and beyond in every customer satisfaction category.

The seat pads are past there sell by date now and are uncomfotable. Also, with screens in the back of the seat, the seats shouldnt be able to recline as this puts rhe screen in your face.

Traveling to a place near Denver?

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Everything you need to know for your flight to Denver

Information on the airport you'll fly into in Denver

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