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$281+ Cheap flights from Key Largo, FL to Madrid, Spain (MAD)

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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — MAD
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheapflights Tip: The best prices from Key Largo to Madrid Barajas are usually found in February or January, booked 72 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

Cheap flight deals from Key Largo to Madrid

Cheapest flights from Key Largo to Madrid
Explore the most affordable flight options available from Key Largo to Madrid. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 12/15. 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.
Tue 12/3011:15 pmMIA - MAD
1 stop18h 44mITA Airways
Thu 1/2911:40 amMAD - MIA
1 stop15h 15mITA Airways
Deal found 12/15$454
This Mytrip deal was found by Cheapflights users on 12/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3011:15 pmMIA - MAD
1 stop18h 44mITA Airways
Wed 1/146:00 pmMAD - MIA
1 stop32h 55mITA Airways
Deal found 12/15$466
This eDestinos deal was found by Cheapflights users on 12/15. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2410:30 pmMIA - MAD
Nonstop8h 35mIberia
Tue 1/274:25 pmMAD - MIA
Nonstop10h 20mIberia
Deal found 12/15$470
This Cheapflightsfares deal was found by Cheapflights users on 12/15. 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.
Tue 12/3010:30 pmMIA - MAD
Nonstop8h 35mFinnair
Wed 1/2812:55 amMAD - MIA
1 stop25h 44mFinnair
Deal found 12/15$472
This British Airways deal was found by Cheapflights users on 12/13. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/305:20 pmMIA - MAD
Nonstop8h 35mBritish Airways
Thu 1/2911:30 amMAD - MIA
Nonstop10h 15mBritish Airways
Deal found 12/13$474
This Cheapflightsfares deal was found by Cheapflights users on 12/15. 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.
Tue 12/3010:30 pmMIA - MAD
Nonstop8h 35mFinnair
Wed 1/147:05 amMAD - MIA
1 stop14h 20mFinnair
Deal found 12/15$477
This Finnair deal was found by Cheapflights users on 12/14. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/303:06 pmMIA - MAD
1 stop11h 49mMultiple Airlines
Thu 1/2910:00 amMAD - MIA
Nonstop9h 55mMultiple Airlines
Deal found 12/14$478
This United Airlines deal was found by Cheapflights users on 12/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/137:15 amMIA - MAD
1 stop20h 00mUnited Airlines
Wed 12/1711:15 amMAD - MIA
1 stop14h 59mUnited Airlines
Deal found 12/13$480
This Cheapflightsfares deal was found by Cheapflights users on 12/13. 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.
Sat 12/275:20 pmMIA - MAD
Nonstop8h 35mFinnair
Mon 1/129:35 pmMAD - MIA
1 stop23h 50mFinnair
Deal found 12/13$482
This oojo deal was found by Cheapflights users on 12/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3011:15 pmMIA - MAD
1 stop18h 44mITA Airways
Wed 1/216:00 pmMAD - MIA
1 stop32h 55mITA Airways
Deal found 12/13$484
This KLM deal was found by Cheapflights users on 12/14. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/264:50 pmMIA - MAD
1 stop14h 50mKLM
Tue 1/206:00 amMAD - MIA
1 stop14h 50mKLM
Deal found 12/14$487

Find flight deals from Key Largo to Madrid

Keep the following information in mind while searching for Key Largo to Madrid flight deals. Data was last updated December 15, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$454
(Cheapflightsfares)

One-way from

$281
(eDestinos)

Popular in

June

Cheapest in

February

Average price

$831
Provider with most accurate pricing for Miami-Madrid Barajas flight deals.
Search Deals
Provider most trusted by Cheapflights users for Miami-Madrid Barajas flights.
Search Deals
From Key Largo to Madrid Barajas
Search Deals
One-way flight from Key Largo to Madrid Barajas
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($223 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Key Largo to Madrid 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 December 15, 2025.
Use the filters below to find and compare flights from Key Largo to Madrid that are best for you.

Fly from

Key Largo

Fly to

Madrid

Route

Depart

Return

Price

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Tue 3/3

8:45 am-8:00 am

2 stops17h 15m

Madrid Barajas

Mon 3/16

12:40 pm-1:15 pm

2 stops29h 35m

$472

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Tue 1/13

9:00 am-4:40 pm

2 stops25h 40m

Madrid Barajas

Tue 2/3

1:35 pm-10:20 pm

2 stops38h 45m

$478

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Mon 1/12

1:45 pm-4:40 pm

2 stops20h 55m

Madrid Barajas

Mon 1/19

1:35 pm-10:20 pm

3 stops38h 45m

$478

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Mon 1/12

7:40 am-9:10 am

2 stops19h 30m

Madrid Barajas

Wed 1/21

1:05 pm-2:50 pm

1 stop31h 45m

$485

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Sat 2/14

4:10 pm-12:05 pm

2 stops37h 55m

Madrid Barajas

Sun 3/1

5:55 am-2:40 pm

1 stop14h 45m

$493

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Wed 1/21

9:45 pm-12:05 pm

Nonstop8h 20m

Madrid Barajas

Sun 1/25

3:25 pm-7:30 pm

Nonstop10h 05m

$533

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Sun 5/17

4:54 pm-9:35 am

1 stop10h 41m

Madrid Barajas

Tue 6/2

4:20 pm-11:41 pm

1 stop13h 21m

$539

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Thu 5/7

8:10 pm-7:15 pm

1 stop17h 05m

Madrid Barajas

Sat 5/16

10:25 am-2:45 pm

1 stop34h 20m

$540

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Thu 5/21

11:15 am-6:20 am

1 stop13h 05m

Madrid Barajas

Sun 5/31

6:00 am-2:45 pm

1 stop14h 45m

$541

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Wed 5/6

11:15 am-6:20 am

1 stop13h 05m

Madrid Barajas

Tue 5/19

6:00 am-2:45 pm

1 stop14h 45m

$541

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/13

Showing 1-10 of 21 results
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Best time to book a flight from Key Largo to Madrid

Have a flexible travel schedule? Discover the best time to fly to Madrid 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 Madrid

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

Use this chart to determine the optimal time to book a round-trip flight from Key Largo to Madrid. Price data was last updated on December 12, 2025.

The best time to book flights from Key Largo to Madrid is 72 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 Key Largo to Madrid?

Currently, October is the cheapest month in which you can book a flight from Key Largo to Madrid (average of $111). Flying from Key Largo to Madrid in June is currently the most expensive (average of $587). 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 MAD?

Find hourly flight availability from Key Largo to Madrid. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 15, 2025.

It’s typically best to fly out from Key Largo to Madrid in the evening. Doing so could potentially save you 14% on the flight price compared to flying in the morning, which is usually more expensive.

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

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

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

Weekly flight availability from Key Largo to Madrid

Explore weekly flight availability from Key Largo to Madrid. 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 December 15, 2025.

The most flights from KE9 to MAD are scheduled on a Tuesday (24 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (15 on average).

Reviews of airlines servicing Madrid

Get insights into the airlines that provide service to Madrid. 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 Madrid. Reviews last updated December 15, 2025.
Peruse reviews from past customers who have flown with American Airlines, TAP AIR PORTUGAL, and Air Europa from Key Largo to Madrid to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
11,051 reviews

Overall

7.2

Comfort

7.2

Entertainment

6.9

Food

6.5

Boarding

7.5

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

MIA - DCA

Flight delayed 5 hours and was told it was due to mechanical issues. Instead of providing lodging due to missed connecting flight, American changed the cause of delay to weather, which meant they were not able required to provide a hotel. To make matters worse, one of our checked bags was lost even though its status said it was “by the plane” but no one at the service desk seemed able to locate it.
American Airlines
7.2
Good
11,051 reviews
American Airlines
7.2
Good
11,051 reviews

Overall

7.2

Comfort

7.2

Entertainment

6.9

Food

6.5

Boarding

7.5

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

MIA - DCA

Flight delayed 5 hours and was told it was due to mechanical issues. Instead of providing lodging due to missed connecting flight, American changed the cause of delay to weather, which meant they were not able required to provide a hotel. To make matters worse, one of our checked bags was lost even though its status said it was “by the plane” but no one at the service desk seemed able to locate it.
TAP AIR PORTUGAL
7.2
Good
2,089 reviews
American Airlines
7.2
Good
11,051 reviews

Overall

7.2

Comfort

7.2

Entertainment

6.9

Food

6.5

Boarding

7.5

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

MIA - DCA

Flight delayed 5 hours and was told it was due to mechanical issues. Instead of providing lodging due to missed connecting flight, American changed the cause of delay to weather, which meant they were not able required to provide a hotel. To make matters worse, one of our checked bags was lost even though its status said it was “by the plane” but no one at the service desk seemed able to locate it.
Air Europa
7.0
Good
571 reviews
American Airlines
7.2
Good
11,051 reviews

Overall

7.2

Comfort

7.2

Entertainment

6.9

Food

6.5

Boarding

7.5

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

MIA - DCA

Flight delayed 5 hours and was told it was due to mechanical issues. Instead of providing lodging due to missed connecting flight, American changed the cause of delay to weather, which meant they were not able required to provide a hotel. To make matters worse, one of our checked bags was lost even though its status said it was “by the plane” but no one at the service desk seemed able to locate it.
Iberia
7.0
Good
3,051 reviews
American Airlines
7.2
Good
11,051 reviews

Overall

7.2

Comfort

7.2

Entertainment

6.9

Food

6.5

Boarding

7.5

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

MIA - DCA

Flight delayed 5 hours and was told it was due to mechanical issues. Instead of providing lodging due to missed connecting flight, American changed the cause of delay to weather, which meant they were not able required to provide a hotel. To make matters worse, one of our checked bags was lost even though its status said it was “by the plane” but no one at the service desk seemed able to locate it.
British Airways
6.7
Okay
7,575 reviews
American Airlines
7.2
Good
11,051 reviews

Overall

7.2

Comfort

7.2

Entertainment

6.9

Food

6.5

Boarding

7.5

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

MIA - DCA

Flight delayed 5 hours and was told it was due to mechanical issues. Instead of providing lodging due to missed connecting flight, American changed the cause of delay to weather, which meant they were not able required to provide a hotel. To make matters worse, one of our checked bags was lost even though its status said it was “by the plane” but no one at the service desk seemed able to locate it.

Related info for your journey

Find useful and relevant information for your journey from Key Largo to Madrid. 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 Madrid from Key Largo?

    Located just 8.5 mi from the city center, Madrid Barajas is the airport most travelers will use when flying to Madrid from Key Largo. Booking flights from Key Largo to Barajas (MAD) should be relatively easy as there are 18 daily inbound flights from Key Largo from 22 different airlines.

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

    Within the past month, 307 users have taken a look at flights from Key Largo to Madrid Barajas.

  • How long is the flight from Key Largo to Madrid?

    For as low as $472, United Airlines can have you in Madrid from Key Largo in 17h 15m. The distance between Key Largo and Madrid is about 4412 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as $164. However, be on the lookout for offers from Vueling and Delta, as they are both options that can get you from Key Largo to Madrid for a low price.

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

    Consider Kuwait Airways (100%), Royal Jordanian (93%) or Finnair (87%) when booking your flight. These represent the most reliable airlines when flying from Key Largo to Madrid.

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

    On average you can expect to pay $1,633 for a flight from Key Largo to Madrid. The cheapest flight overall is $339 while the most popular route, (Miami - Madrid Barajas) is currently priced at $380.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Key Largo to Madrid (average of $111). Flying from Key Largo to Madrid in June is currently the most expensive (average of $587). 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 Madrid?

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Top 10 airlines flying from Key Largo to Madrid

Discover the top 10 airlines that operate flights from Key Largo to Madrid. 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 December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$111Average$574FlexibilityNo cancel feeOn-time62%
SWISSCheapest$137Average$541FlexibilityNo cancel feeOn-time79%
ITA AirwaysCheapest$277Average$489FlexibilityNo cancel feeOn-time81%
TAP AIR PORTUGALCheapest$351Average$564FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$351Average$556FlexibilityNo cancel feeOn-time69%
DeltaCheapest$367Average$566FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$378Average$566FlexibilityNo cancel feeOn-time67%
KLMCheapest$383Average$610FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$392Average$612FlexibilityNo cancel feeOn-time72%
FinnairCheapest$395Average$594FlexibilityNo cancel feeOn-time76%

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