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Key Largo

$72+ Cheap flights from Las Vegas (LAS) to Key Largo, FL

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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
LAS — MIA
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
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 Las Vegas Harry Reid Intl to Key Largo are usually found in September or August, booked 29 days in advance, depart on a Thursday or Saturday and return on a Tuesday

Cheap flight deals from Las Vegas to Key Largo

Keep the following information in mind while searching for Las Vegas to Key Largo flight deals. Data was last updated July 29, 2025.

Round-trip from

$142
(Cheapflightsfares)

One-way from

$72
(Cheapflightsfares)

Popular in

March

Cheapest in

September

Average price

$300
From Las Vegas Harry Reid Intl to Key Largo
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One-way flight from Las Vegas Harry Reid Intl to Key Largo
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Highest demand for flights based on searches. 12% potential increase in price ($40 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 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 Las Vegas to Key Largo

Cheapest flights from Las Vegas to Key Largo
Explore the most affordable flight options available from Las Vegas to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 7/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/159:48 pmLAS - MIA
Nonstop4h 57mFrontier
Mon 8/187:15 amMIA - LAS
Nonstop5h 05mFrontier
Deal found 7/27$142
This Cheapflightsfares deal was found by Cheapflights users on 7/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1711:00 amLAS - MIA
Nonstop4h 48mSpirit Airlines
Sun 9/216:28 pmMIA - LAS
Nonstop5h 33mSpirit Airlines
Deal found 7/27$144
This American Airlines deal was found by Cheapflights users on 7/28. 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.
Wed 8/279:24 amLAS - MIA
Nonstop5h 06mAmerican Airlines
Wed 9/38:49 amMIA - LAS
Nonstop5h 13mAmerican Airlines
Deal found 7/28$183
This Southwest deal was found by Cheapflights users on 7/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/276:50 amLAS - MIA
2 stops11h 25mSouthwest
Wed 9/32:50 pmMIA - LAS
1 stop7h 05mSouthwest
Deal found 7/28$204

Cheapflights Fare Finder

 
Customize your flight search to find flights from Las Vegas to Key Largo 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 29, 2025.
Use the filters below to find and compare flights from Las Vegas to Key Largo that are best for you.

Fly from

Las Vegas

Fly to

Key Largo

Route

Depart

Return

Price

Las VegasMiami

LAS - MIA

LASMIA

Las Vegas Harry Reid Intl

Fri 8/15

9:48 pm-5:45 am

Nonstop4h 57m

Miami

Mon 8/18

7:15 am-9:20 am

Nonstop5h 05m

$142

Las VegasMiami

LAS - MIA

LASMIA

Las Vegas Harry Reid Intl

Wed 9/17

11:00 am-6:48 pm

Nonstop4h 48m

Miami

Sun 9/21

6:28 pm-9:01 pm

Nonstop5h 33m

$144

Las VegasMiami

LAS - MIA

LASMIA

Las Vegas Harry Reid Intl

Wed 8/27

9:24 am-5:30 pm

Nonstop5h 06m

Miami

Wed 9/3

8:49 am-11:02 am

Nonstop5h 13m

$183

Las VegasMiami

LAS - MIA

LASMIA

Las Vegas Harry Reid Intl

Wed 8/27

6:50 am-9:15 pm

2 stops11h 25m

Miami

Wed 9/3

2:50 pm-6:55 pm

1 stop7h 05m

$204

Las VegasMiami

LAS - MIA

LASMIA

Las Vegas Harry Reid Intl

Fri 8/15

11:20 am-10:37 pm

1 stop8h 17m

Miami

Sat 8/16

7:15 am-9:20 am

Nonstop5h 05m

$205

Las VegasMiami

LAS - MIA

LASMIA

Las Vegas Harry Reid Intl

Thu 9/4

11:00 am-6:48 pm

Nonstop4h 48m

$72

Las VegasMiami

LAS - MIA

LASMIA

Las Vegas Harry Reid Intl

Wed 8/13

9:48 pm-5:45 am

Nonstop4h 57m

$75

Las VegasMiami

LAS - MIA

LASMIA

Las Vegas Harry Reid Intl

Wed 8/27

10:30 am-8:40 pm

1 stop7h 10m

$99

Las VegasMiami

LAS - MIA

LASMIA

Las Vegas Harry Reid Intl

Sun 8/24

11:15 pm-11:20 am

1 stop9h 05m

$120

Las VegasMiami

LAS - MIA

LASMIA

Las Vegas Harry Reid Intl

Mon 8/18

12:33 am-10:52 am

1 stop7h 19m

$129

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

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

Have a flexible travel schedule? Discover the best time to fly to Key Largo from Las Vegas 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 Las Vegas to Key Largo

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

Use this chart to determine the optimal time to book a round-trip flight from Las Vegas to Key Largo. Price data was last updated on July 25, 2025.

The best time to book flights from Las Vegas to Key Largo is 29 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, September is the cheapest month in which you can book a flight from Las Vegas to Key Largo (average of $232). Flying from Las Vegas to Key Largo in March is currently the most expensive (average of $289). 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 LAS to KE9?

Find hourly flight availability from Las Vegas to Key Largo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 29, 2025.

When flying from Las Vegas to Key Largo, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

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

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

Weekly flight availability from Las Vegas to Key Largo

Explore weekly flight availability from Las Vegas to Key Largo. 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 29, 2025.

The most flights from LAS to KE9 are scheduled on a Saturday (15 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (11 on average).

Reviews of airlines servicing Key Largo

Get insights into the airlines that provide service to Key Largo. 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 Key Largo. Reviews last updated July 29, 2025.
Read through reviews of airlines operating flights from Las Vegas to Key Largo, such as Southwest, Delta, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,238 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,238 reviews
Southwest
8.0
Very good
4,238 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,977 reviews
Southwest
8.0
Very good
4,238 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,238 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Spirit Airlines
6.3
Okay
8,040 reviews
Southwest
8.0
Very good
4,238 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Frontier
5.9
Fair
3,238 reviews
Southwest
8.0
Very good
4,238 reviews

Crew

8.6

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Related info for your journey

Find useful and relevant information for your journey from Las Vegas to Key Largo. 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 from for flights from Las Vegas to Key Largo?

    If you book a flight to Key Largo from Las Vegas, you will be flying from Harry Reid Intl, which is the city’s only airport. Las Vegas Harry Reid Intl (LAS) is located 6.2 mi from the center of Las Vegas. There are 13 flights from Harry Reid Intl to Key Largo per day from 7 different airlines.

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

    Within the past month, 34 users have taken a look at flights from Las Vegas Harry Reid Intl to Key Largo.

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

    The cheapest airlines for a one-way flight from Las Vegas to Key Largo are Spirit Airlines ($72), Frontier ($75), and Southwest ($99).

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

    Consider Qatar Airways (89%), GOL (81%) or Royal Air Maroc (81%) when booking your flight. These represent the most reliable airlines when flying from Las Vegas to Key Largo.

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

    On average you can expect to pay $843 for a flight from Las Vegas to Key Largo. The cheapest flight overall is $69 while the most popular route, (Las Vegas Harry Reid Intl - Miami) is currently priced at $122.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Las Vegas to Key Largo 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 Las Vegas to Key Largo?

    Currently, September is the cheapest month in which you can book a flight from Las Vegas to Key Largo (average of $232). Flying from Las Vegas to Key Largo in March is currently the most expensive (average of $289). 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.

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Top 7 airlines flying from Las Vegas to Key Largo

Discover the top 7 airlines that operate flights from Las Vegas to Key Largo. 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 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$81Average$172FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$93Average$201FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$147Average$312FlexibilityNo cancel feeOn-time62%
DeltaCheapest$149Average$343FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$172Average$399FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$210Average$369FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$212Average$374FlexibilityNo cancel feeOn-time71%

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