$577 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 5/20. 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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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, Jul 2 - Wed, Jul 15
Air Transat Logo
11:35 am - 10:17 pm
LIS
-
LAS
18h 42m
1 stop
Air Transat Logo
11:15 pm - 9:35 am
LAS
-
LIS
26h 20m
1 stop
$811Air Transat
Thu, Jul 2 - Wed, Jul 15
Air Transat Logo
11:35 am - 10:17 pm
LIS
-
LAS
18h 42m
1 stop
Air Transat Logo
11:15 pm - 9:35 am
LAS
-
LIS
26h 20m
1 stop
$815Air Transat
Thu, Jul 2 - Wed, Sep 2
Air Transat Logo
11:35 am - 10:17 pm
LIS
-
LAS
18h 42m
1 stop
Air Transat Logo
11:15 pm - 9:35 am
LAS
-
LIS
26h 20m
1 stop
$833Air Transat
Thu, Jul 2 - Wed, Jul 15
Air Transat Logo
1:30 pm - 10:17 pm
OPO
-
LAS
16h 47m
1 stop
Air Transat Logo
11:15 pm - 11:45 am
LAS
-
OPO
28h 30m
1 stop
$847Air Transat
Sun, Jun 7 - Sun, Jun 14
Multiple Airlines Logo
6:10 am - 5:15 pm
LIS
-
LAS
43h 05m
3 stops
Multiple Airlines Logo
4:35 pm - 9:45 pm
LAS
-
LIS
21h 10m
2 stops
$898Multiple Airlines
Tue, Sep 1 - Thu, Sep 10
Multiple Airlines Logo
8:25 am - 12:30 pm
OPO
-
LAS
36h 05m
3 stops
Multiple Airlines Logo
8:30 am - 11:45 am
LAS
-
OPO
19h 15m
2 stops
$901Multiple Airlines
Sun, Jun 7 - Sun, Jun 14
WestJet Logo
6:10 am - 12:55 pm
LIS
-
LAS
38h 45m
3 stops
WestJet Logo
4:35 pm - 9:45 pm
LAS
-
LIS
21h 10m
2 stops
$902WestJet
Sun, Jun 7 - Sun, Jun 14
WestJet Logo
6:10 am - 9:40 pm
LIS
-
LAS
23h 30m
2 stops
WestJet Logo
4:35 pm - 9:45 pm
LAS
-
LIS
21h 10m
2 stops
$903WestJet
Mon, Sep 21 - Sun, Sep 27
Delta Logo
5:00 am - 7:37 pm
OPO
-
LAS
22h 37m
2 stops
Delta Logo
9:25 am - 10:25 am
LAS
-
OPO
17h 00m
1 stop
$974Delta
Sun, Sep 20 - Sat, Sep 26
KLM Logo
12:25 pm - 9:56 pm
OPO
-
LAS
17h 31m
1 stop
KLM Logo
9:25 am - 10:20 am
LAS
-
OPO
16h 55m
1 stop
$988KLM
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 flight to Las Vegas?

These are the best round-trip prices found by users searching on KAYAK in the last 72 hours.

In the last 3 days, the cheapest flight deal to Las Vegas was found on the route from Porto, at $811 return. The most popular connection is from San Francisco to Las Vegas and KAYAK users have found round-trip deals for as low as $111 in the last 3 days.

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 return flights. On the other hand, the most expensive months are August and May, where the average cost of tickets from Portugal is $1,100 and $1,050 respectively. For one-way flights, 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 8 weeks before departure, which saves you about 36% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.

Find deals

Good to know

Low seasonDecember
Cheapest flight$555
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly with an average 13% increase in price.
Flight from Porto to Las Vegas

FAQs - booking Las Vegas flights

  • What is the cheapest flight to Las Vegas?

    In the last 3 days, the cheapest flight deal to Las Vegas was found on the route from Porto, at $811 return. The most popular connection is from San Francisco to Las Vegas and KAYAK users have found round-trip deals for as low as $111 in the last 3 days.

  • 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 7,555 direct flights from within Portugal to Las Vegas. The most common day for departures is Sunday, with 18% 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 8446 reviews
7.8Entertainment
7.2Food
8.5Crew
7.8Comfort
8.1Boarding
Airline reviews

Bus to plane was delayed for no apparent reason and our luggage was still on the belt when they shut it off. Took about 20 minutes to turn it back on to get our luggage.

6.0 GoodAnonymous, May 2026
PDX - MSP
Read more Delta reviews

Bus to plane was delayed for no apparent reason and our luggage was still on the belt when they shut it off. Took about 20 minutes to turn it back on to get our luggage.

Every flight was delayed except the last one. One layover turned into two. Travel time extended by three hours. No compensation offered. Repeatedly asked if I'd like to cancel my flight for a partial refund.

It was a pleasant surprise to have complimentary Wi-Fi on the flight

Much better than Latam, the worse airline company ever. I hope I don't have the need to fly Latam ever in my life again.

Everything could and should be better. We are paying for, it's not a favor, it's a service and should involve quality, responsibility and respect.

Seats were comfortable, 8 hours. One flight attendant was not appropriate in his verbal response: "Please, DON'T touch me.", after being tapped near his elbow after being made unaware he skipped serving me & had passed further down the aisle.

Boarding in Amsterdam is always chaotic. More complicated than needs to be ( boarding pass checked twice, once for general security, then by the airline). The bathrooms on this flight are dirty, and smelly. The food was mediocre at best The crew was decent

Seats in Delta Main are unbelievably close to the seat in front of. Hard to get a backpack under the seat.

Round trip flight to Canada and back to the US was smooth and efficient.

The agent at check in and at the gate were less than thrilled to be at work. I'm not a fan of Kayak's placement on the plane. I got put in the middle seat and none of my preferences were used.

Traveling to a place near Las Vegas?

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Everything you need to know for your flight to Las Vegas

Information on the airport you'll fly into in Las Vegas

Las Vegas (LAS)