HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Key Largo

$43+ Cheap flights from Baltimore (BWI) 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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — MIA
ago. 3 — ago. 101
dom. 8/3
dom. 8/10
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Baltimore to Key Largo with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Baltimore/Washington to Key Largo are usually found in September or August, booked 20 days in advance, depart on a Monday or Friday and return on a Monday

Cheap flight deals from Baltimore to Key Largo

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

Round-trip from

$84
(CheapOair)

One-way from

$43
(Cheapflightsfares)

Popular in

December

Cheapest in

September

Average price

$184
From Baltimore/Washington to Key Largo
Search Deals
One-way flight from Baltimore/Washington to Key Largo
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($38 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from Baltimore to Key Largo

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

This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/12:31 pmBWI - MIA
Nonstop2h 49mFrontier
lun. 9/84:01 pmMIA - BWI
Nonstop2h 49mFrontier
Deal found 7/28$84
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/165:30 pmBWI - MIA
Nonstop2h 54mSpirit Airlines
sáb. 8/239:29 pmMIA - BWI
Nonstop2h 30mSpirit Airlines
Deal found 7/27$91
This CheapOair deal was found by Cheapflights users on 7/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/285:30 pmBWI - MIA
Nonstop2h 54mMultiple Airlines
dom. 8/317:40 amMIA - BWI
Nonstop2h 47mMultiple Airlines
Deal found 7/29$110

Cheapflights Fare Finder

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

Fly from

Baltimore

Fly to

Key Largo

Route

Depart

Return

Price

BaltimoreMiami

BWI - MIA

BWIMIA

Baltimore/Washington

lun. 9/1

2:31 pm-5:20 pm

Nonstop2h 49m

Miami

lun. 9/8

4:01 pm-6:50 pm

Nonstop2h 49m

$84

BaltimoreMiami

BWI - MIA

BWIMIA

Baltimore/Washington

sáb. 8/16

5:30 pm-8:24 pm

Nonstop2h 54m

Miami

sáb. 8/23

9:29 pm-11:59 pm

Nonstop2h 30m

$91

BaltimoreMiami

BWI - MIA

BWIMIA

Baltimore/Washington

jue. 8/28

5:30 pm-8:24 pm

Nonstop2h 54m

Miami

dom. 8/31

7:40 am-10:27 am

Nonstop2h 47m

$110

BaltimoreMiami

BWI - MIA

BWIMIA

Baltimore/Washington

dom. 9/7

12:00 pm-2:55 pm

Nonstop2h 55m

$43

BaltimoreMiami

BWI - MIA

BWIMIA

Baltimore/Washington

lun. 9/8

4:46 pm-7:38 pm

Nonstop2h 52m

$47

BaltimoreMiami

BWI - MIA

BWIMIA

Baltimore/Washington

mié. 9/17

6:25 pm-9:15 pm

Nonstop2h 50m

$69

BaltimoreMiami

BWI - MIA

BWIMIA

Baltimore/Washington

mié. 8/20

6:00 am-8:42 am

Nonstop2h 42m

$79

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Best time to book a flight from Baltimore to Key Largo

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

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

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

The price you pay for your flight from Baltimore to Key Largo may vary depending on when you book. For the best chance of a lower fare, look to book 20 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, September is the cheapest month in which you can book a flight from Baltimore to Key Largo (average of $232). Flying from Baltimore 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 BWI to KE9?

Find hourly flight availability from Baltimore 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 julio 29, 2025.

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

What is the cheapest day to fly from Baltimore to Key Largo?

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

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

Weekly flight availability from Baltimore to Key Largo

Explore weekly flight availability from Baltimore 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 julio 29, 2025.

The most flights from BWI to KE9 are scheduled on a Thursday (10 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (2 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 julio 29, 2025.
See what other customers who have flown with Southwest, American Airlines, and Spirit Airlines from Baltimore to Key Largo have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

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

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

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

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

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
8,044 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

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

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Crew

8.6

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 Baltimore 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 Baltimore to Key Largo?

    Baltimore/Washington (BWI) is the airport you will fly out of if you book a flight from Baltimore to Key Largo. You should not have trouble finding flights to Key Largo from Baltimore/Washington; the airport handles an average of 7 outbound flights to Key Largo per day. You should also have plenty of airline options to choose from since 7 airlines have flights from the Baltimore airport to Key Largo. It is only a 8.5 mi journey to Baltimore/Washington (BWI) from Baltimore’s city center.

  • How popular is this Baltimore to Key Largo flight route?

    Flights from Baltimore/Washington to Key Largo have been viewed 238 times in the past calendar month.

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

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $43. Spirit Airlines flights start at $47 while deals on Southwest start at $69 one-way.

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

    Consider Royal Air Maroc (100%), Frontier (80%) or Spirit Airlines (77%) when booking your flight. These represent the most reliable airlines when flying from Baltimore to Key Largo.

  • What are the cheapest flights from Baltimore to Key Largo?

    Looking at all options, your cheapest flight can be booked for $35. While the most popular route (Baltimore/Washington - Miami) can be booked for $77 on average our data indicates $656 when flying from Baltimore to Key Largo.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Baltimore 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 Baltimore to Key Largo?

    Currently, September is the cheapest month in which you can book a flight from Baltimore to Key Largo (average of $232). Flying from Baltimore 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Baltimore to Key Largo

See prices for flight routes from nearby airports that may be better suited for you.
Baltimore to Fort Lauderdale flights
Dulles Intl to Miami flights
Philadelphia to Orlando flights
Baltimore to Miami flights
Reagan-National to Miami flights
Baltimore to Orlando flights
Dulles Intl to Fort Lauderdale flights
Dulles Intl to Orlando flights
Philadelphia to Fort Lauderdale flights
Reagan-National to Orlando flights
Reagan-National to Fort Lauderdale flights
Philadelphia to Miami flights
Dulles Intl to Tampa flights
Reagan-National to Tampa flights
Baltimore to Tampa flights
Philadelphia to Tampa flights
Dulles Intl to Fort Myers flights
Dulles Intl to West Palm Beach flights
Philadelphia to Key West flights
Reagan-National to West Palm Beach flights
Philadelphia to Jacksonville flights
Baltimore to Fort Myers flights
Baltimore to West Palm Beach flights
Philadelphia to Fort Myers flights
Reagan-National to Fort Myers flights
Reagan-National to Key West flights
Dulles Intl to Key West flights
Dulles Intl to Jacksonville flights
Reagan-National to Jacksonville flights
Reagan-National to Pensacola flights
Philadelphia to West Palm Beach flights
Philadelphia to Melbourne flights
Dulles Intl to Pensacola flights
Baltimore to Jacksonville flights
Baltimore to Pensacola flights
Baltimore to Key West flights
Baltimore to Sarasota flights
Reagan-National to Sarasota flights
Philadelphia to Sarasota flights
Reagan-National to Panama City flights
Dulles Intl to Panama City flights
Baltimore to Valparaiso flights
Philadelphia to Daytona Beach flights
Philadelphia to Pensacola flights
Philadelphia to Panama City flights
Baltimore to Panama City flights
Dulles Intl to Sarasota flights
Reagan-National to Valparaiso flights
Philadelphia to Tallahassee flights
Dulles Intl to Valparaiso flights

Top 7 airlines flying from Baltimore to Key Largo

Discover the top 7 airlines that operate flights from Baltimore 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 julio 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$49Average$148FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$73Average$174FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$85Average$260FlexibilityNo cancel feeOn-time62%
DeltaCheapest$147Average$380FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$161Average$386FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$167Average$407FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$175Average$370FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.