HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Madrid

$210+ 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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — MAD
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Key Largo to Madrid 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 Key Largo to Madrid Barajas are usually found in February or January, booked 72 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

Find 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 October 30, 2025.

This Finnair deal was found by Cheapflights users on 10/30. 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.
Mon 12/111:25 amMIA - MAD
1 stop12h 20mMultiple Airlines
Mon 12/84:25 pmMAD - MIA
Nonstop10h 20mMultiple Airlines
Deal found 10/30$453
This Finnair deal was found by Cheapflights users on 10/29. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/173:00 pmMIA - MAD
1 stop11h 50mMultiple Airlines
Mon 12/1511:00 amMAD - MIA
1 stop13h 17mMultiple Airlines
Deal found 10/29$454
This Finnair deal was found by Cheapflights users on 10/29. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/301:36 pmMIA - MAD
1 stop14h 49mMultiple Airlines
Thu 11/1311:00 amMAD - MIA
1 stop13h 19mMultiple Airlines
Deal found 10/29$455
This FlightHub deal was found by Cheapflights users on 10/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/275:20 pmMIA - MAD
Nonstop8h 35mBritish Airways
Thu 12/111:00 pmMAD - MIA
1 stop13h 56mBritish Airways
Deal found 10/29$456
This Delta deal was found by Cheapflights users on 10/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/178:05 amMIA - MAD
2 stops17h 55mDelta
Wed 12/312:35 pmMAD - MIA
1 stop13h 45mDelta
Deal found 10/29$457
This Mytrip deal was found by Cheapflights users on 10/30. 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.
Fri 10/317:45 pmMIA - MAD
1 stop22h 50mMultiple Airlines
Thu 11/206:00 amMAD - MIA
2 stops22h 29mMultiple Airlines
Deal found 10/30$458
This Finnair deal was found by Cheapflights users on 10/29. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2710:30 pmMIA - MAD
Nonstop8h 35mMultiple Airlines
Fri 12/1211:00 amMAD - MIA
1 stop13h 17mMultiple Airlines
Deal found 10/29$459
This Gurufare deal was found by Cheapflights users on 10/29. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1010:15 pmMIA - MAD
1 stop17h 55mBritish Airways
Fri 11/2111:30 amMAD - MIA
1 stop15h 30mBritish Airways
Deal found 10/29$460
This Air Canada deal was found by Cheapflights users on 10/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1712:25 pmMIA - MAD
1 stop16h 35mAir Canada
Sat 12/61:35 pmMAD - MIA
2 stops40h 24mAir Canada
Deal found 10/29$461
This British Airways deal was found by Cheapflights users on 10/30. 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.
Wed 11/2611:25 amMIA - MAD
1 stop12h 20mBritish Airways
Mon 12/81:00 pmMAD - MIA
1 stop13h 56mBritish Airways
Deal found 10/30$463
This Iberia deal was found by Cheapflights users on 10/30. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/156:50 pmMIA - MAD
1 stop29h 25mIberia
Sat 12/611:30 amMAD - MIA
Nonstop10h 15mIberia
Deal found 10/30$464

Cheap 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 October 30, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$453
(Finnair)

One-way from

$210
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$528
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 ($221 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 October 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 October 30, 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

Sun 11/23

2:30 pm-8:55 am

1 stop12h 25m

Madrid Barajas

Sat 12/6

1:00 pm-8:37 pm

1 stop13h 37m

$463

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Wed 11/26

11:25 am-5:45 am

1 stop12h 20m

Madrid Barajas

Mon 12/8

1:00 pm-8:56 pm

1 stop13h 56m

$463

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Thu 11/27

12:02 pm-6:20 am

1 stop12h 18m

Madrid Barajas

Fri 12/12

11:00 am-6:17 pm

1 stop13h 17m

$463

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Mon 11/24

11:25 am-5:45 am

1 stop12h 20m

Madrid Barajas

Sat 12/6

1:00 pm-8:37 pm

1 stop13h 37m

$463

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Tue 1/6

11:13 am-5:45 am

1 stop12h 32m

Madrid Barajas

Thu 1/22

11:00 am-6:28 pm

1 stop13h 28m

$479

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Wed 11/12

12:26 pm-4:40 pm

2 stops22h 14m

Madrid Barajas

Mon 12/8

6:00 am-2:40 pm

1 stop14h 40m

$486

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Sat 1/10

4:00 pm-8:50 am

1 stop10h 50m

Madrid Barajas

Sat 1/17

7:40 am-8:00 pm

1 stop18h 20m

$489

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Tue 11/4

7:00 am-4:10 pm

2 stops27h 10m

Madrid Barajas

Thu 11/13

6:00 am-10:29 pm

2 stops22h 29m

$492

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Thu 11/13

12:26 pm-4:40 pm

2 stops22h 14m

Madrid Barajas

Wed 11/19

5:55 am-11:04 pm

2 stops23h 09m

$496

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Wed 11/26

12:23 pm-1:15 pm

2 stops18h 52m

Madrid Barajas

Tue 12/16

11:15 am-8:09 pm

1 stop14h 54m

$508

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 22 results
1
2
3

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 October 24, 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 October 30, 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.

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 October 30, 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
11,030 reviews

Boarding

7.5

Crew

8.0

Overall

7.2

Food

6.4

Comfort

7.2

Entertainment

6.9

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
11,030 reviews
American Airlines
7.2
Good
11,030 reviews

Boarding

7.5

Crew

8.0

Overall

7.2

Food

6.4

Comfort

7.2

Entertainment

6.9

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
7.1
Good
2,037 reviews
American Airlines
7.2
Good
11,030 reviews

Boarding

7.5

Crew

8.0

Overall

7.2

Food

6.4

Comfort

7.2

Entertainment

6.9

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
568 reviews
American Airlines
7.2
Good
11,030 reviews

Boarding

7.5

Crew

8.0

Overall

7.2

Food

6.4

Comfort

7.2

Entertainment

6.9

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
3,001 reviews
American Airlines
7.2
Good
11,030 reviews

Boarding

7.5

Crew

8.0

Overall

7.2

Food

6.4

Comfort

7.2

Entertainment

6.9

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
7,487 reviews
American Airlines
7.2
Good
11,030 reviews

Boarding

7.5

Crew

8.0

Overall

7.2

Food

6.4

Comfort

7.2

Entertainment

6.9

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 10 daily inbound flights from Key Largo from 23 different airlines.

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

    Within the past month, 287 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 $463, British Airways can have you in Madrid from Key Largo in 12h 20m. The distance between Key Largo and Madrid is about 4412 mi.

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

    Consider Air Europa (92%), SAUDIA (92%) or Kenya Airways (92%) 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 $1,569 for a flight from Key Largo to Madrid. The cheapest flight overall is $286 while the most popular route, (Miami - Madrid Barajas) is currently priced at $312.

  • 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?

Book flights to Madrid if you plan to visit one of these locations
Fuenlabrada
Getafe

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.

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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$111Average$574FlexibilityNo cancel feeOn-time62%
SWISSCheapest$137Average$552FlexibilityNo cancel feeOn-time79%
AviancaCheapest$310Average$1,274FlexibilityNo cancel feeOn-time71%
ITA AirwaysCheapest$341Average$472FlexibilityNo cancel feeOn-time81%
TAP AIR PORTUGALCheapest$346Average$558FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$351Average$550FlexibilityNo cancel feeOn-time69%
DeltaCheapest$367Average$549FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$378Average$561FlexibilityNo cancel feeOn-time67%
KLMCheapest$383Average$671FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$392Average$620FlexibilityNo cancel feeOn-time72%

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.