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$286+ 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 2/16. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — MAD
Mar 2 — Mar 91
Mon 3/2
Mon 3/9
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 Wednesday

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 January 31, 2026.

This eDestinos deal was found by Cheapflights users on 1/31. 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.
Mon 2/26:50 pm
MIA
-
MAD
1 stop13h 25m
Iberia
Wed 2/114:25 pm
MAD
-
MIA
Nonstop10h 20m
Iberia
Deal found 1/31$419
This eDestinos deal was found by Cheapflights users on 1/31. 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.
Mon 2/910:30 pm
MIA
-
MAD
Nonstop8h 35m
Iberia
Wed 2/184:25 pm
MAD
-
MIA
Nonstop10h 20m
Iberia
Deal found 1/31$421
This eDestinos deal was found by Cheapflights users on 1/31. 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.
Tue 3/32:07 pm
MIA
-
MAD
1 stop12h 43m
Iberia
Tue 3/1711:30 am
MAD
-
MIA
Nonstop9h 40m
Iberia
Deal found 1/31$423
This Kiwi.com deal was found by Cheapflights users on 1/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/314:30 pm
MIA
-
MAD
1 stop11h 35m
TAP AIR PORTUGAL
Sun 4/2610:25 pm
MAD
-
MIA
1 stop22h 10m
TAP AIR PORTUGAL
Deal found 1/29$425
This Mytrip deal was found by Cheapflights users on 1/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/134:35 pm
MIA
-
MAD
1 stop24h 55m
TAP AIR PORTUGAL
Tue 2/1712:10 pm
MAD
-
MIA
1 stop32h 40m
TAP AIR PORTUGAL
Deal found 1/28$426
This Flightnetwork deal was found by Cheapflights users on 1/29. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/294:30 pm
MIA
-
MAD
1 stop20h 40m
TAP AIR PORTUGAL
Tue 4/74:20 pm
MAD
-
MIA
1 stop28h 10m
TAP AIR PORTUGAL
Deal found 1/29$427
This Mytrip deal was found by Cheapflights users on 1/31. 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.
Mon 2/24:35 pm
MIA
-
MAD
1 stop15h 30m
TAP AIR PORTUGAL
Tue 2/1712:10 pm
MAD
-
MIA
1 stop32h 40m
TAP AIR PORTUGAL
Deal found 1/31$428
This FlightHub deal was found by Cheapflights users on 1/29. 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.
Sun 4/1212:30 am
MIA
-
MAD
1 stop12h 40m
TAP AIR PORTUGAL
Tue 5/510:25 pm
MAD
-
MIA
1 stop22h 05m
TAP AIR PORTUGAL
Deal found 1/29$429
This Kiwi.com deal was found by Cheapflights users on 1/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1912:30 am
MIA
-
MAD
1 stop17h 50m
TAP AIR PORTUGAL
Sun 4/2610:25 pm
MAD
-
MIA
1 stop22h 10m
TAP AIR PORTUGAL
Deal found 1/30$430
This oojo deal was found by Cheapflights users on 1/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/264:35 pm
MIA
-
MAD
1 stop15h 30m
TAP AIR PORTUGAL
Tue 3/36:00 pm
MAD
-
MIA
1 stop26h 50m
TAP AIR PORTUGAL
Deal found 1/29$431
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/611:35 pm
MIA
-
MAD
1 stop14h 45m
TAP AIR PORTUGAL
Wed 2/117:40 am
MAD
-
MIA
1 stop13h 10m
TAP AIR PORTUGAL
Deal found 1/28$432
This FlightHub deal was found by Cheapflights users on 1/31. 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.
Wed 2/254:35 pm
MIA
-
MAD
1 stop10h 55m
TAP AIR PORTUGAL
Wed 3/117:40 am
MAD
-
MIA
1 stop13h 10m
TAP AIR PORTUGAL
Deal found 1/31$434

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 January 31, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$423
(eDestinos)

One-way from

$286
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$497
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 ($227 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 31, 2026.
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

Mon 3/2

9:45 pm-12:05 pm

Nonstop8h 20m

Madrid Barajas

Thu 4/16

3:25 pm-6:45 pm

Nonstop9h 20m

$474

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Mon 2/9

10:33 am-9:15 am

1 stop16h 42m

Madrid Barajas

Thu 2/12

11:15 am-12:53 am

1 stop19h 38m

$481

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Wed 2/4

8:15 am-8:00 am

2 stops17h 45m

Madrid Barajas

Tue 2/17

11:15 am-8:44 pm

1 stop15h 29m

$481

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Tue 2/24

9:00 am-9:15 am

2 stops18h 15m

Madrid Barajas

Tue 3/3

1:35 pm-9:59 pm

3 stops38h 24m

$496

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Wed 3/4

9:24 am-9:10 am

2 stops17h 46m

Madrid Barajas

Fri 3/13

9:00 am-6:54 pm

1 stop14h 54m

$496

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Sun 2/8

11:50 pm-8:20 pm

1 stop14h 30m

Madrid Barajas

Tue 2/17

7:40 am-2:50 pm

1 stop13h 10m

$504

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Sun 2/8

6:20 am-9:15 am

2 stops20h 55m

Madrid Barajas

Wed 2/11

11:15 am-10:55 am

2 stops29h 40m

$514

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Tue 2/3

6:25 pm-8:00 am

2 stops31h 35m

Madrid Barajas

Wed 2/11

8:30 am-6:16 pm

2 stops39h 46m

$520

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Sat 2/28

4:10 pm-4:40 pm

2 stops42h 30m

Madrid Barajas

Fri 3/6

6:00 am-10:37 pm

2 stops22h 37m

$527

MiamiMadrid

MIA - MAD

MIAMAD

Miami

Sat 3/7

9:45 pm-12:05 pm

Nonstop8h 20m

Madrid Barajas

Wed 4/15

3:25 pm-6:45 pm

Nonstop9h 20m

$534

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/30

Showing 1-10 of 22 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 January 30, 2026.

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 January 31, 2026.

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

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 January 31, 2026.

The most flights from KE9 to MAD are scheduled on a Saturday (24 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 on average).

How much does it cost to fly round-trip from Key Largo to Madrid?

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 January 31, 2026.
Peruse reviews from past customers who have flown with American Airlines, TAP AIR PORTUGAL, and Iberia 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
11,213 reviews

Comfort

7.2

Crew

8.0

Food

6.4

Boarding

7.5

Overall

7.2

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Susie,Jan 2026

TPA - CLT

I was sitting at the back of the plane and the flight attendants were so loud, talking to each other and laughing! I thought they were having a party back there.
American Airlines
7.2
Good
11,213 reviews
American Airlines
7.2
Good
11,213 reviews

Comfort

7.2

Crew

8.0

Food

6.4

Boarding

7.5

Overall

7.2

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Susie,Jan 2026

TPA - CLT

I was sitting at the back of the plane and the flight attendants were so loud, talking to each other and laughing! I thought they were having a party back there.
TAP AIR PORTUGAL
7.1
Good
2,131 reviews
American Airlines
7.2
Good
11,213 reviews

Comfort

7.2

Crew

8.0

Food

6.4

Boarding

7.5

Overall

7.2

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Susie,Jan 2026

TPA - CLT

I was sitting at the back of the plane and the flight attendants were so loud, talking to each other and laughing! I thought they were having a party back there.
Iberia
7.0
Good
3,100 reviews
American Airlines
7.2
Good
11,213 reviews

Comfort

7.2

Crew

8.0

Food

6.4

Boarding

7.5

Overall

7.2

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Susie,Jan 2026

TPA - CLT

I was sitting at the back of the plane and the flight attendants were so loud, talking to each other and laughing! I thought they were having a party back there.
Air Europa
6.9
Okay
586 reviews
American Airlines
7.2
Good
11,213 reviews

Comfort

7.2

Crew

8.0

Food

6.4

Boarding

7.5

Overall

7.2

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Susie,Jan 2026

TPA - CLT

I was sitting at the back of the plane and the flight attendants were so loud, talking to each other and laughing! I thought they were having a party back there.
British Airways
6.7
Okay
7,706 reviews
American Airlines
7.2
Good
11,213 reviews

Comfort

7.2

Crew

8.0

Food

6.4

Boarding

7.5

Overall

7.2

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Susie,Jan 2026

TPA - CLT

I was sitting at the back of the plane and the flight attendants were so loud, talking to each other and laughing! I thought they were having a party back there.

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 15 daily inbound flights from Key Largo from 21 different airlines.

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

    Within the past month, 312 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 $474, Air Europa can have you in Madrid from Key Largo in 8h 20m. 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 $163. 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 Air Europa (90%), Etihad Airways (90%) or Kuwait Airways (86%) 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 $1,615 for a flight from Key Largo to Madrid. The cheapest flight overall is $368 while the most popular route, (Miami - Madrid Barajas) is currently priced at $381.

  • 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 January 31, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$111Average$574FlexibilityNo cancel feeOn-time62%
SWISSCheapest$137Average$541FlexibilityNo cancel feeOn-time79%
ITA AirwaysCheapest$277Average$473FlexibilityNo cancel feeOn-time81%
TAP AIR PORTUGALCheapest$349Average$567FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$351Average$579FlexibilityNo cancel feeOn-time69%
DeltaCheapest$367Average$574FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$378Average$572FlexibilityNo cancel feeOn-time67%
KLMCheapest$383Average$582FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$398Average$620FlexibilityNo cancel feeOn-time77%
FinnairCheapest$398Average$597FlexibilityNo cancel feeOn-time76%

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