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$71+ Cheap flights from Key Largo, FL to Las Vegas (LAS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/14. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — LAS
Jul 30 — Aug 61
Wed 7/30
Wed 8/6
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Key Largo to Las Vegas Harry Reid Intl are usually found in January or February, booked 41 days in advance, depart on a Tuesday or Saturday and return on a Thursday

Cheap flight deals from Key Largo to Las Vegas

Keep the following information in mind while searching for Key Largo to Las Vegas flight deals. Data was last updated July 25, 2025.

Round-trip from

$143
(Cheapflightsfares)

One-way from

$71
(Cheapflightsfares)

Popular in

December

Cheapest in

January

Average price

$307
From Key Largo to Las Vegas Harry Reid Intl
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One-way flight from Key Largo to Las Vegas Harry Reid Intl
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Highest demand for flights based on searches. 2% potential increase in price ($8 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Key Largo to Las Vegas

Cheapest flights from Key Largo to Las Vegas
Explore the most affordable flight options available from Key Largo to Las Vegas. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 25, 2025.

This Justfly.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/117:00 amMIA - LAS
Nonstop5h 27mSpirit Airlines
Mon 8/1811:22 amLAS - MIA
Nonstop5h 01mSpirit Airlines
Deal found 7/24$142
This Frontier deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/117:15 amMIA - LAS
Nonstop5h 05mFrontier
Fri 8/159:48 pmLAS - MIA
Nonstop4h 57mFrontier
Deal found 7/24$148
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/117:15 amMIA - LAS
Nonstop5h 05mMultiple Airlines
Mon 8/1811:22 amLAS - MIA
Nonstop5h 01mMultiple Airlines
Deal found 7/24$153
This American Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/238:05 pmMIA - LAS
Nonstop5h 04mAmerican Airlines
Tue 8/269:24 amLAS - MIA
Nonstop5h 06mAmerican Airlines
Deal found 7/24$179

Cheapflights Fare Finder

 
Customize your flight search to find flights from Key Largo to Las Vegas that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 25, 2025.
Use the filters below to find and compare flights from Key Largo to Las Vegas that are best for you.

Fly from

Key Largo

Fly to

Las Vegas

Route

Depart

Return

Price

MiamiLas Vegas

MIA - LAS

MIALAS

Miami

Mon 8/11

7:00 am-9:27 am

Nonstop5h 27m

Las Vegas Harry Reid Intl

Mon 8/18

11:22 am-7:23 pm

Nonstop5h 01m

$142

MiamiLas Vegas

MIA - LAS

MIALAS

Miami

Thu 8/7

7:15 am-9:20 am

Nonstop5h 05m

Las Vegas Harry Reid Intl

Wed 8/13

2:30 pm-10:32 pm

Nonstop5h 02m

$145

MiamiLas Vegas

MIA - LAS

MIALAS

Miami

Thu 8/7

7:15 am-9:20 am

Nonstop5h 05m

Las Vegas Harry Reid Intl

Fri 8/15

9:48 pm-5:45 am

Nonstop4h 57m

$160

MiamiLas Vegas

MIA - LAS

MIALAS

Miami

Thu 8/14

7:15 am-9:20 am

Nonstop5h 05m

$71

MiamiLas Vegas

MIA - LAS

MIALAS

Miami

Mon 9/1

8:23 pm-10:35 pm

Nonstop5h 12m

$72

MiamiLas Vegas

MIA - LAS

MIALAS

Miami

Fri 8/22

4:40 pm-10:45 pm

1 stop9h 05m

$99

MiamiLas Vegas

MIA - LAS

MIALAS

Miami

Fri 8/8

11:11 am-9:03 pm

1 stop12h 52m

$108

MiamiLas Vegas

MIA - LAS

MIALAS

Miami

Fri 12/12

5:55 pm-9:30 am

1 stop18h 35m

$112

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/24

Best time to book a flight from Key Largo to Las Vegas

Have a flexible travel schedule? Discover the best time to fly to Las Vegas from Key Largo with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Key Largo to Las Vegas

How far ahead should I book a flight from Key Largo to Las Vegas?

Use this chart to determine the optimal time to book a round-trip flight from Key Largo to Las Vegas. Price data was last updated on July 18, 2025.

To ensure you get the cheapest price possible for a flight from Key Largo to Las Vegas, you should look to book at least 41 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Key Largo to Las Vegas?

Currently, August is the cheapest month in which you can book a flight from Key Largo to Las Vegas (average of $198). Flying from Key Largo to Las Vegas in March is currently the most expensive (average of $269). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from KE9 to LAS?

Find hourly flight availability from Key Largo to Las Vegas. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 25, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Key Largo to Las Vegas as you normally would.

What is the cheapest day to fly from Key Largo to Las Vegas?

Use this chart to determine the cheapest time to fly round-trip from Key Largo to Las Vegas. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Key Largo to Las Vegas flight should consider departing on Saturday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Key Largo to Las Vegas

Explore weekly flight availability from Key Largo to Las Vegas. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 25, 2025.

The most flights from KE9 to LAS are scheduled on a Thursday (15 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (12 on average).

Reviews of airlines servicing Las Vegas

Get insights into the airlines that provide service to Las Vegas. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Las Vegas. Reviews last updated July 25, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and Spirit Airlines from Key Largo to Las Vegas by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,233 reviews

Comfort

8.0

Entertainment

7.6

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.
Southwest
8.0
Very good
4,233 reviews
Southwest
8.0
Very good
4,233 reviews

Comfort

8.0

Entertainment

7.6

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.
Delta
8.0
Very good
7,967 reviews
Southwest
8.0
Very good
4,233 reviews

Comfort

8.0

Entertainment

7.6

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.
Spirit Airlines
6.3
Okay
8,034 reviews
Southwest
8.0
Very good
4,233 reviews

Comfort

8.0

Entertainment

7.6

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.
Frontier
5.9
Fair
3,244 reviews
Southwest
8.0
Very good
4,233 reviews

Comfort

8.0

Entertainment

7.6

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Related info for your journey

Find useful and relevant information for your journey from Key Largo to Las Vegas. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Las Vegas from Key Largo?

    For a flight from Key Largo to Las Vegas, you will be flying into Harry Reid Intl. Las Vegas Harry Reid Intl (LAS) is just 6.2 mi from the center of the city. Harry Reid Intl is the only Las Vegas airport and it handles 13 inbound flights from Key Largo per day. 7 airlines have flights to Las Vegas Harry Reid Intl from Key Largo on a regular basis.

  • How popular is this Key Largo to Las Vegas flight route?

    Flights from Key Largo to Las Vegas Harry Reid Intl have been viewed 83 times in the past calendar month.

  • What are the cheapest airlines to fly from Key Largo to Las Vegas one-way?

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $71. Spirit Airlines flights start at $72 while deals on Southwest start at $99 one-way.

  • What are the most reliable airlines from Key Largo to Las Vegas?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Key Largo to Las Vegas on time: Frontier (80%), Spirit Airlines (79%), GOL (73%).

  • What are the cheapest flights from Key Largo to Las Vegas?

    Looking for the cheapest flight from Key Largo to Las Vegas? While on average our users pay $1,006, our data indicates the cheapest price to be $76. The most popular route (Miami - Las Vegas Harry Reid Intl), is priced around $136.

  • Can I find deals for flights from Key Largo to Las Vegas that include hotel bookings?

    Yes. In addition to deals on Key Largo to Las Vegas flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Key Largo to Las Vegas?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Key Largo to Las Vegas.

  • Can I find deals for business class flights from Key Largo to Las Vegas?

    Yes. Cheapflights offers flight deals from Key Largo to Las Vegas by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Key Largo to Las Vegas?

    Currently, August is the cheapest month in which you can book a flight from Key Largo to Las Vegas (average of $198). Flying from Key Largo to Las Vegas in March is currently the most expensive (average of $269). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Las Vegas?

Book flights to Las Vegas if you plan to visit one of these locations
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Top 7 airlines flying from Key Largo to Las Vegas

Discover the top 7 airlines that operate flights from Key Largo to Las Vegas. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$95Average$208FlexibilityNo cancel feeOn-time65%
FrontierCheapest$126Average$187FlexibilityNo cancel feeOn-time62%
DeltaCheapest$140Average$336FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$176Average$377FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$178Average$405FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$195Average$355FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$216Average$348FlexibilityNo cancel feeOn-time69%

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