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$177+ Cheap flights from Key Largo, FL to Portugal

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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — LIS
Aug 6 — Aug 131
Wed 8/6
Wed 8/13
1 adult, Economy
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Cheap flight deals from Key Largo to Portugal

Keep the following information in mind while searching for Key Largo to Portugal flight deals. Data was last updated August 1, 2025.

Round-trip from

$476
(Iberia)

One-way from

$177
(Trip.com)

Popular in

June

Cheapest in

February

Average price

$844
From Key Largo to Portugal
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One-way flight from Key Largo to Portugal
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Highest demand for flights based on searches. 20% potential increase in price ($203 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Key Largo to Portugal

Cheapest flights from Key Largo to Portugal
Explore the most affordable flight options available from Key Largo to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 1, 2025.

This Iberia deal was found by Cheapflights users on 7/30. 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.
Thu 10/1611:41 amMIA - LIS
2 stops15h 04mIberia
Thu 10/308:45 pmLIS - MIA
1 stop21h 55mIberia
Deal found 7/30$476
This oojo deal was found by Cheapflights users on 8/1. 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.
Fri 10/244:35 pmMIA - LIS
Nonstop8h 15mTAP AIR PORTUGAL
Mon 11/310:10 amLIS - MIA
Nonstop9h 40mTAP AIR PORTUGAL
Deal found 8/1$477
This Air Europa deal was found by Cheapflights users on 8/1. 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 Europa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/49:45 pmMIA - LIS
1 stop16h 30mAir Europa
Mon 11/248:05 pmLIS - MIA
1 stop28h 25mAir Europa
Deal found 8/1$478
This Delta deal was found by Cheapflights users on 8/1. 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.
Wed 10/293:35 pmMIA - LIS
2 stops19h 00mDelta
Sat 11/155:00 amLIS - MIA
2 stops19h 31mDelta
Deal found 8/1$479
This Ovago deal was found by Cheapflights users on 7/30. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/127:40 pmMIA - LIS
1 stop32h 25mBritish Airways
Wed 8/2011:05 amLIS - MIA
1 stop12h 37mBritish Airways
Deal found 7/30$482
This Finnair deal was found by Cheapflights users on 7/31. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/195:30 pmMIA - LIS
1 stop10h 35mMultiple Airlines
Sat 11/2910:30 amLIS - MIA
1 stop13h 05mMultiple Airlines
Deal found 7/31$483
This Mytrip deal was found by Cheapflights users on 7/31. 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 9/811:50 amMIA - FAO
2 stops24h 25mMultiple Airlines
Mon 9/158:10 pmFAO - MIA
2 stops26h 20mMultiple Airlines
Deal found 7/31$497
This American Airlines deal was found by Cheapflights users on 8/1. 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.
Thu 10/233:37 pmMIA - LIS
2 stops12h 28mAmerican Airlines
Thu 11/610:55 amLIS - MIA
2 stops15h 50mAmerican Airlines
Deal found 8/1$499
This lol.travel deal was found by Cheapflights users on 8/1. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/184:53 pmMIA - PDL
2 stops35h 47mUnited Airlines
Wed 9/311:00 amPDL - MIA
1 stop29h 16mUnited Airlines
Deal found 8/1$506
This lol.travel deal was found by Cheapflights users on 7/31. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2112:35 amMIA - FAO
1 stop11h 45mTAP AIR PORTUGAL
Wed 10/86:05 amFAO - MIA
1 stop20h 45mTAP AIR PORTUGAL
Deal found 7/31$529
This flugladen.de deal was found by Cheapflights users on 7/30. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/17:25 amMIA - PDL
1 stop20h 30mMultiple Airlines
Sat 11/155:20 pmPDL - MIA
1 stop25h 22mMultiple Airlines
Deal found 7/30$545
This Gurufare deal was found by Cheapflights users on 7/30. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/257:35 pmMIA - OPO
1 stop33h 15mBritish Airways
Fri 10/311:15 amOPO - MIA
2 stops17h 02mBritish Airways
Deal found 7/30$585

Cheapflights Fare Finder

 
Customize your flight search to find flights from Key Largo to Portugal 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 August 1, 2025.
Use the filters below to find and compare flights from Key Largo to Portugal that are best for you.

Fly from

Key Largo

Fly to

Portugal

Route

Depart

Return

Price

MiamiLisbon

MIA - LIS

MIALIS

Miami

Thu 10/16

11:41 am-7:45 am

2 stops15h 04m

Lisbon Humberto Delgado

Thu 10/30

8:45 pm-2:40 pm

1 stop21h 55m

$476

MiamiLisbon

MIA - LIS

MIALIS

Miami

Fri 10/24

4:35 pm-5:50 am

Nonstop8h 15m

Lisbon Humberto Delgado

Mon 11/3

10:10 am-2:50 pm

Nonstop9h 40m

$477

MiamiLisbon

MIA - LIS

MIALIS

Miami

Wed 10/29

3:35 pm-2:35 pm

2 stops19h 00m

Lisbon Humberto Delgado

Sat 11/15

5:00 am-7:31 pm

2 stops19h 31m

$479

MiamiLisbon

MIA - LIS

MIALIS

Miami

Tue 8/12

7:40 pm-9:05 am

1 stop32h 25m

Lisbon Humberto Delgado

Wed 8/20

11:05 am-6:42 pm

1 stop12h 37m

$482

MiamiLisbon

MIA - LIS

MIALIS

Miami

Thu 10/23

3:33 pm-8:00 am

1 stop11h 27m

Lisbon Humberto Delgado

Mon 11/3

5:30 am-8:20 pm

1 stop19h 50m

$487

MiamiLisbon

MIA - LIS

MIALIS

Miami

Thu 8/21

9:30 pm-7:15 pm

1 stop16h 45m

Lisbon Humberto Delgado

Thu 8/28

7:40 am-6:45 pm

1 stop16h 05m

$492

MiamiLisbon

MIA - LIS

MIALIS

Miami

Mon 10/27

9:05 pm-9:20 am

2 stops32h 15m

Lisbon Humberto Delgado

Thu 11/6

5:00 am-8:16 pm

2 stops20h 16m

$497

MiamiFaro

MIA - FAO

MIAFAO

Miami

Mon 9/8

11:50 am-5:15 pm

2 stops24h 25m

Faro

Mon 9/15

8:10 pm-5:30 pm

2 stops26h 20m

$497

MiamiLisbon

MIA - LIS

MIALIS

Miami

Thu 10/23

3:37 pm-9:05 am

2 stops12h 28m

Lisbon Humberto Delgado

Thu 11/6

10:55 am-9:45 pm

2 stops15h 50m

$499

MiamiPonta Delgada

MIA - PDL

MIAPDL

Miami

Mon 8/18

4:53 pm-8:40 am

2 stops35h 47m

Ponta Delgada Nordela

Wed 9/3

11:00 am-12:16 pm

1 stop29h 16m

$506

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/1

Showing 1-10 of 60 results
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6

Best time to book a flight from Key Largo to Portugal

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

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

Currently, January is the cheapest month in which you can book a flight from Key Largo to Portugal (average of $612). Flying from Key Largo to Portugal in June is currently the most expensive (average of $1,129). 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 PT?

Find hourly flight availability from Key Largo to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 1, 2025.

When flying from Key Largo to Portugal, 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 Key Largo to Portugal?

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

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

Weekly flight availability from Key Largo to Portugal

Explore weekly flight availability from Key Largo to Portugal. 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 August 1, 2025.

The most flights from KE9 to PT0 are scheduled on a Thursday (5 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. 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 Portugal. Reviews last updated August 1, 2025.
Read reviews from past customers who have flown Delta, KLM, and SWISS from Key Largo to Portugal. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,983 reviews

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Delta
8.0
Very good
7,983 reviews
Delta
8.0
Very good
7,983 reviews

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
KLM
7.8
Good
1,384 reviews
Delta
8.0
Very good
7,983 reviews

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
SWISS
7.5
Good
1,686 reviews
Delta
8.0
Very good
7,983 reviews

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
United Airlines
7.4
Good
8,904 reviews
Delta
8.0
Very good
7,983 reviews

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Virgin Atlantic
7.4
Good
655 reviews
Delta
8.0
Very good
7,983 reviews

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Food

7.3

Boarding

8.2

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.

Related info for your journey

Find useful and relevant information for your journey from Key Largo to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Within the past month, 129 users have taken a look at flights from Key Largo to Portugal.

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

    The cheapest airlines for a one-way flight from Key Largo to Portugal are TAP AIR PORTUGAL ($257), Virgin Atlantic ($282), and KLM ($283).

  • What are the most popular routes from Key Largo to Portugal?

    Most travelers choose Miami - Lisbon Humberto Delgado, Miami - Porto or Miami - Funchal Madeira when deciding on the best route from Key Largo to Portugal.

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

    Before booking your flight to Portugal from Key Largo, check out the most reliable airlines to get you to your destination on time: TAP AIR PORTUGAL (77%), Emirates (72%), JetBlue( 65%).

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

    The cheapest flight price from Key Largo to Portugal is $214. On average you can expect to pay $1,447. The most popular route, (Miami - Lisbon Humberto Delgado), can usually be booked for $380.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Key Largo to Portugal (average of $612). Flying from Key Largo to Portugal in June is currently the most expensive (average of $1,129). 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 10 airlines flying from Key Largo to Portugal

Discover the top 10 airlines that operate flights from Key Largo to Portugal. 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 August 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest$370Average$659FlexibilityNo cancel feeOn-time76%
SWISSCheapest$377Average$570FlexibilityNo cancel feeOn-time79%
IberiaCheapest$406Average$724FlexibilityNo cancel feeOn-time77%
Air EuropaCheapest$454Average$671FlexibilityNo cancel feeOn-time83%
TAP AIR PORTUGALCheapest$464Average$868FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$479Average$681FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$494Average$785FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$503Average$747FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$506Average$719FlexibilityNo cancel feeOn-time70%
DeltaCheapest$515Average$753FlexibilityNo cancel feeOn-timeN/A

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