HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portugal

$246+ 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 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — LIS
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 Portugal 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.

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 October 30, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$441
(FlightHub)

One-way from

$246
(Connections by easyJet)

Popular in

June

Cheapest in

February

Average price

$697
Provider with most accurate pricing for Miami-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Miami-Lisbon Humberto Delgado flights.
Search Deals
From Key Largo to Portugal
Search Deals
One-way flight from Key Largo to Portugal
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($186 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 30, 2025.

This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/47:55 pmMIA - OPO
1 stop16h 00mScandinavian Airlines
Mon 12/85:35 pmOPO - MIA
1 stop29h 30mScandinavian Airlines
Deal found 10/30$422
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/114:40 pmMIA - OPO
1 stop13h 30mMultiple Airlines
Sun 12/146:15 amOPO - MIA
1 stop15h 40mMultiple Airlines
Deal found 10/29$461
This KAYAK deal was found by Cheapflights users on 10/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/267:50 pmMIA - OPO
1 stop34h 20mSWISS
Mon 12/112:05 pmOPO - MIA
1 stop31h 35mSWISS
Deal found 10/28$462
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/267:50 pmMIA - OPO
1 stop34h 20mSWISS
Wed 12/312:10 pmOPO - MIA
1 stop31h 30mSWISS
Deal found 10/29$463
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2512:20 pmMIA - LIS
2 stops16h 00mMultiple Airlines
Wed 12/35:00 amLIS - MIA
1 stop14h 40mMultiple Airlines
Deal found 10/29$467
This KAYAK deal was found by Cheapflights users on 10/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/264:40 pmMIA - LIS
1 stop14h 05mSWISS
Mon 12/111:50 amLIS - MIA
1 stop34h 40mSWISS
Deal found 10/28$470
This KAYAK deal was found by Cheapflights users on 10/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/277:50 pmMIA - OPO
1 stop34h 20mSWISS
Tue 12/212:05 pmOPO - MIA
1 stop31h 35mSWISS
Deal found 10/28$470
This AirNGo 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/911:50 pmMIA - OPO
1 stop30h 15mTAP AIR PORTUGAL
Mon 11/246:55 amOPO - MIA
1 stop12h 55mTAP AIR PORTUGAL
Deal found 10/30$471
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/26:45 pmMIA - LIS
1 stop13h 35mLufthansa
Tue 12/95:00 amLIS - MIA
1 stop14h 40mLufthansa
Deal found 10/30$474
This KAYAK deal was found by Cheapflights users on 10/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/277:50 pmMIA - LIS
1 stop34h 55mSWISS
Tue 12/212:35 pmLIS - MIA
1 stop33h 55mSWISS
Deal found 10/28$475
This SmartFares deal was found by Cheapflights users on 10/28. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/264:20 pmMIA - LIS
1 stop11h 35mMultiple Airlines
Wed 12/35:00 amLIS - MIA
1 stop14h 40mMultiple Airlines
Deal found 10/28$476
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:35 pmMIA - LIS
Nonstop8h 00mTAP AIR PORTUGAL
Wed 12/105:10 pmLIS - MIA
Nonstop9h 40mTAP AIR PORTUGAL
Deal found 10/30$477

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 October 30, 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

MiamiPorto

MIA - OPO

MIAOPO

Miami

Mon 1/12

4:35 pm-7:00 pm

1 stop21h 25m

Porto

Sat 1/31

4:55 pm-2:50 pm

1 stop26h 55m

$441

MiamiPorto

MIA - OPO

MIAOPO

Miami

Thu 12/11

4:40 pm-11:10 am

1 stop13h 30m

Porto

Sun 12/14

6:15 am-4:55 pm

1 stop15h 40m

$461

MiamiLisbon

MIA - LIS

MIALIS

Miami

Tue 1/13

8:40 pm-4:05 pm

1 stop14h 25m

Lisbon Humberto Delgado

Sun 1/25

4:55 pm-6:35 pm

1 stop30h 40m

$479

MiamiPorto

MIA - OPO

MIAOPO

Miami

Wed 11/26

9:00 am-9:30 am

2 stops19h 30m

Porto

Mon 12/1

12:05 pm-5:30 pm

1 stop34h 25m

$482

MiamiPorto

MIA - OPO

MIAOPO

Miami

Fri 11/14

7:15 am-9:30 am

1 stop21h 15m

Porto

Tue 11/18

12:05 pm-5:30 pm

1 stop34h 25m

$482

MiamiPorto

MIA - OPO

MIAOPO

Miami

Fri 11/14

9:00 am-9:30 am

2 stops19h 30m

Porto

Tue 11/18

6:00 am-11:24 am

2 stops34h 24m

$484

MiamiLisbon

MIA - LIS

MIALIS

Miami

Wed 11/26

7:00 am-8:55 am

2 stops20h 55m

Lisbon Humberto Delgado

Wed 12/3

5:00 am-2:40 pm

1 stop14h 40m

$485

MiamiLisbon

MIA - LIS

MIALIS

Miami

Wed 1/21

11:43 am-8:00 am

1 stop15h 17m

Lisbon Humberto Delgado

Wed 1/28

5:00 am-5:48 pm

2 stops17h 48m

$487

MiamiLisbon

MIA - LIS

MIALIS

Miami

Wed 11/26

7:00 am-8:55 am

2 stops20h 55m

Lisbon Humberto Delgado

Wed 12/3

5:00 am-2:40 pm

1 stop14h 40m

$489

MiamiLisbon

MIA - LIS

MIALIS

Miami

Tue 12/2

9:00 am-9:20 am

2 stops19h 20m

Lisbon Humberto Delgado

Fri 12/12

11:20 am-4:42 pm

2 stops34h 22m

$490

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 60 results
1
2
3
...
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, November is the cheapest month in which you can book a flight from Key Largo to Portugal (average of $306). Flying from Key Largo to Portugal in June is currently the most expensive (average of $598). 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 October 30, 2025.

It’s typically best to fly out from Key Largo to Portugal in the evening. Doing so could potentially save you 5% on the flight price compared to flying at noon, which is usually more expensive.

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 Tuesday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 October 30, 2025.
Read reviews from past customers who have flown Delta, Air Canada, and TAP AIR PORTUGAL 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
7.9
Good
7,998 reviews

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

7.9

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
7.9
Good
7,998 reviews
Delta
7.9
Good
7,998 reviews

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

7.9

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.
Air Canada
7.1
Good
10,382 reviews
Delta
7.9
Good
7,998 reviews

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

7.9

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.
TAP AIR PORTUGAL
7.1
Good
2,040 reviews
Delta
7.9
Good
7,998 reviews

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

7.9

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.
Air Europa
7.0
Good
568 reviews
Delta
7.9
Good
7,998 reviews

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

7.9

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.
British Airways
6.7
Okay
7,488 reviews
Delta
7.9
Good
7,998 reviews

Crew

8.5

Comfort

7.9

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

7.9

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, 120 users have taken a look at flights from Key Largo to Portugal.

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

    There are many flights that can get you from Key Largo to Portugal in 14h 25m. Fly via TAP AIR PORTUGAL, Scandinavian Airlines, or KLM to get the fastest option. Airlines will cover a distance of 4146 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 Air Canada ($270), United Airlines ($270), and Lufthansa ($271).

  • 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: Emirates (80%), JetBlue (74%), TAP AIR PORTUGAL( 74%).

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

    The cheapest flight price from Key Largo to Portugal is $173. On average you can expect to pay $1,378. The most popular route, (Miami - Lisbon Humberto Delgado), can usually be booked for $417.

  • 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, November is the cheapest month in which you can book a flight from Key Largo to Portugal (average of $306). Flying from Key Largo to Portugal in June is currently the most expensive (average of $598). 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 Key Largo to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
Miami to Madrid flights
Miami to Heathrow flights
Miami to Charles de Gaulle flights
Orlando to Heathrow flights
Miami to Barcelona-El Prat flights
Miami to Leonardo da Vinci/Fiumicino flights
Orlando to Madrid flights
Miami to Istanbul flights
Tampa to Heathrow flights
Fort Lauderdale to Madrid flights
Orlando to Gatwick flights
Miami to Lisbon flights
Orlando to Charles de Gaulle flights
Miami to Gatwick flights
Miami to Frankfurt flights
Miami to Zurich flights
Miami to London City flights
Fort Lauderdale to Charles de Gaulle flights
Miami to Sabiha Gokcen flights
Orlando to London City flights
Orlando to Frankfurt flights
Orlando to Leonardo da Vinci/Fiumicino flights
Miami to Orly flights
Tampa to Frankfurt flights
Fort Lauderdale to Heathrow flights
Miami to Stansted flights
Orlando to Dublin flights
Miami to Malpensa flights
Orlando to Orly flights
Miami to Amsterdam flights
Orlando to Barcelona-El Prat flights
Fort Lauderdale to Leonardo da Vinci/Fiumicino flights
Miami to Luton flights
Miami to Beauvais-Tille flights
Miami to Linate flights
Orlando to Stansted flights
Tampa to Gatwick flights
Miami to Munich flights
Tampa to London City flights
Orlando to Amsterdam flights
Miami to Athens flights
Tampa to Leonardo da Vinci/Fiumicino flights
Fort Lauderdale to Frankfurt flights
Fort Lauderdale to Gatwick flights
Miami to Frederic Chopin flights
Tampa to Madrid flights
West Palm Beach to Madrid flights
Orlando to Luton flights
Tampa to Charles de Gaulle flights
Fort Lauderdale to Orly flights

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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$287Average$600FlexibilityNo cancel feeOn-time79%
FinnairCheapest$370Average$631FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$371Average$476FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$439Average$833FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$442Average$818FlexibilityNo cancel feeOn-time76%
Air EuropaCheapest$451Average$671FlexibilityNo cancel feeOn-time83%
IberiaCheapest$456Average$695FlexibilityNo cancel feeOn-time77%
KLMCheapest$479Average$642FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$489Average$677FlexibilityNo cancel feeOn-time70%
DeltaCheapest$492Average$769FlexibilityNo cancel feeOn-timeN/A

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.