$362 Find Cheap Flights from Portugal to Las Vegas

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Las Vegas departing on 3/3. 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 Las Vegas

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

Cheapest round-trip
$585
Overall average: $1,058
Air Transat
Thu 3/26Thu 4/9
OPO - LAS • 1 stop
Cheapest one-way
$362
Typical prices: $600-$930
Multiple Airlines
Tue 3/3
LIS - LAS • 3 stops
When to travel
September
Cheapest • 19% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to Las Vegas!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Portugal to Las Vegas

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

Thu, Mar 26 - Thu, Apr 9
Air Transat Logo
8:50 am - 10:42 pm
OPO
-
LAS
20h 52m
1 stop
Air Transat Logo
11:45 pm - 8:05 am
LAS
-
OPO
24h 20m
1 stop
$585Air Transat
Thu, Mar 26 - Thu, Apr 9
Air Transat Logo
8:50 am - 10:42 pm
OPO
-
LAS
20h 52m
1 stop
Air Transat Logo
11:45 pm - 8:05 am
LAS
-
OPO
24h 20m
1 stop
$586Air Transat
Sat, Apr 18 - Thu, Apr 23
Air Transat Logo
9:50 am - 10:02 pm
OPO
-
LAS
20h 12m
1 stop
Air Transat Logo
11:05 pm - 8:05 am
LAS
-
OPO
25h 00m
1 stop
$683Air Transat
Thu, Apr 23 - Mon, May 4
Multiple Airlines Logo
6:35 am - 11:36 pm
LIS
-
LAS
25h 01m
2 stops
Multiple Airlines Logo
7:00 pm - 11:15 am
LAS
-
LIS
32h 15m
1 stop
$738Multiple Airlines
Sun, Mar 8 - Mon, Mar 23
Air Transat Logo
8:35 am - 9:02 pm
LIS
-
LAS
20h 27m
1 stop
Air Transat Logo
12:40 pm - 6:45 am
LAS
-
LIS
35h 05m
1 stop
$739Air Transat
Sun, Mar 8 - Mon, Mar 23
Multiple Airlines Logo
10:40 am - 10:02 pm
LIS
-
LAS
18h 22m
1 stop
Multiple Airlines Logo
12:40 pm - 10:55 am
LAS
-
LIS
15h 15m
1 stop
$765Multiple Airlines
Wed, Apr 22 - Mon, Apr 27
United Airlines Logo
12:35 pm - 8:24 pm
OPO
-
LAS
15h 49m
1 stop
United Airlines Logo
12:26 pm - 9:45 am
LAS
-
OPO
13h 19m
1 stop
$778United Airlines
Wed, Apr 22 - Tue, Apr 28
United Airlines Logo
12:35 pm - 10:15 pm
OPO
-
LAS
17h 40m
1 stop
United Airlines Logo
12:26 pm - 9:45 am
LAS
-
OPO
13h 19m
1 stop
$818United Airlines
Mon, May 4 - Wed, May 13
KLM Logo
7:00 pm - 6:35 pm
OPO
-
LAS
31h 35m
1 stop
KLM Logo
8:25 pm - 10:15 pm
LAS
-
OPO
17h 50m
1 stop
$864KLM
Mon, May 4 - Wed, May 13
KLM Logo
5:00 am - 6:35 pm
OPO
-
LAS
21h 35m
1 stop
KLM Logo
8:25 pm - 3:30 pm
LAS
-
OPO
35h 05m
1 stop
$865KLM
Booking Insights

KAYAK's insights & trends for flights to Las Vegas

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

What is the cheapest month to fly to Las Vegas?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to Las Vegas, 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 Las Vegas is September, where tickets cost $771 on average for one-way flights. On the other hand, the most expensive months are August and March, where the average cost of tickets from Portugal is $1,122 and $1,057 respectively. For return trips, the best month to travel is September with an average price of $771.

How far in advance should I book a flight to Las Vegas?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to Las Vegas, 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, you should book around 0 weeks before departure. For the absolute cheapest price, our data suggests you should book 4 days before departure.

Good to know

Low seasonDecember
Cheapest flight$362
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly with an average 3% increase in price.
Flight from Lisbon to Las Vegas

FAQs - booking Las Vegas flights

  • How far is Las Vegas Harry Reid Intl Airport from central Las Vegas?

    You’ll need to travel 6 miles to reach the Las Vegas city center from Las Vegas Harry Reid Intl Airport.

  • What is the name of Las Vegas’s airport?

    There is only 1 airport in Las Vegas, called Las Vegas Harry Reid Intl Airport (LAS). It can also be referred to as Harry Reid Intl, Las Vegas Mccarran, McCarran, or McCarran Intl.

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

    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 Las Vegas.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Las Vegas 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 Las Vegas?

    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 Las Vegas 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 Las Vegas?

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

  • How many direct flights to Las Vegas are there each week?

    Each week there are around 5,394 direct flights from within Portugal to Las Vegas. The most common day for departures is Sunday, with 19% of flights taking off on this day.

Top tips for finding cheap flights to Las Vegas

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

Reviews of the top airline flying from Portugal to Las Vegas

 
See real verified KAYAK customer reviews for airlines flying to Las Vegas. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Portugal to Las Vegas. 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 Las Vegas? 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 8169 reviews
7.8Entertainment
7.9Comfort
8.5Crew
8.1Boarding
7.2Food
Airline reviews

The flight was great as well as the airline staff

10.0 ExcellentPatty, Feb 2026
TPA - ATL
Read more Delta reviews

The flight was great as well as the airline staff

First class and monitors weren’t working for mine & my husbands. Eventually fixed, but quite annoyed as we bought first class. Also, No foot rests.

Prior to takeoff, the pilot told us there was a possibility of not being able to land and going to Portland. Well that happened, we took off and then did 8 loops around Spokane before the pilot told us we ran out of fuel and had to go to Portland. So for a 35 minute flight we have now been on the plane for 3 hours (boarded at 6:50 am and landed in Portland at 10:30). Then, we just sat in Portland's airport with no updates of when we can start heading back. All of a sudden, our pilots and crew just left, leaving us stranded in a different city and state. We continued to sit in Portland until we finally got a new crew assigned and boarded the plane (This was from 10:30-2). We then sat on the plane for an additional hour before take off because they had to count us multiple times. We finally landed in Spokane at 3:55 PM. So a flight that should have taken at max an hour took us 10 hours and we missed the majority of the recruiting event we went for.

It was delayed but other than that it was great.

Got on the plane and sat there for an hour before departure.

Second flight in a row where the entertainment system is broken. 5 hour long flight with no entertainment and flight attendants did not seem interested in resolving the matter. Very shocked to be treated this poorly considering I paid for a first class experience and have Diamond Medallion status.

They double booked seats, the gate staff changed my ticket as I was boarding she went over to the computer and changed it without telling me. She messed up an entire three row section for me and others. Other travelers were outraged but the gate staff were so rude, so condescending saying it wasn't their problem to solve. I would rate this a zero if I could. Will not fly Delta again I'll stick with United and American.

Comfort seating was on the tight side. Maybe it was a smaller plane(?)

I didn't take this flight. I changed the flight. Why am I getting surveys and notifications on flights that I change. Seems like a defect with Kayak.

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

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