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$222+ 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 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — LIS
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
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 September 15, 2025.

Round-trip from

$404
(Flightnetwork)

One-way from

$222
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$790
From Key Largo to Portugal
Search Deals
One-way flight from Key Largo to Portugal
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Highest demand for flights based on searches. 19% potential increase in price ($186 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 September 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 September 15, 2025.

This Flightnetwork deal was found by Cheapflights users on 9/15. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2710:45 pmMIA - OPO
1 stop28h 05mAir Europa
Wed 11/127:35 amOPO - MIA
1 stop16h 55mAir Europa
Deal found 9/15$404
This Flighttix deal was found by Cheapflights users on 9/15. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/274:50 pmMIA - OPO
2 stops36h 40mUnited Airlines
Wed 11/1212:35 pmOPO - MIA
1 stop15h 29mUnited Airlines
Deal found 9/15$415
This Mytrip deal was found by Cheapflights users on 9/15. 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.
Mon 10/278:00 amMIA - OPO
2 stops24h 50mMultiple Airlines
Wed 11/1212:10 pmOPO - MIA
1 stop34h 20mMultiple Airlines
Deal found 9/15$429
This United Airlines deal was found by Cheapflights users on 9/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/44:42 pmMIA - OPO
1 stop11h 48mUnited Airlines
Thu 11/1312:35 pmOPO - MIA
1 stop15h 29mUnited Airlines
Deal found 9/15$435
This United Airlines deal was found by Cheapflights users on 9/13. 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.
Tue 11/114:42 pmMIA - OPO
1 stop11h 48mUnited Airlines
Fri 11/2112:35 pmOPO - MIA
1 stop15h 29mUnited Airlines
Deal found 9/13$436
This Trip.com deal was found by Cheapflights users on 9/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/59:45 pmMIA - OPO
1 stop12h 30mAir Europa
Tue 11/1111:35 amOPO - MIA
1 stop12h 55mAir Europa
Deal found 9/15$443
This United Airlines deal was found by Cheapflights users on 9/13. 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.
Tue 11/114:42 pmMIA - OPO
1 stop11h 48mUnited Airlines
Thu 11/2012:35 pmOPO - MIA
1 stop15h 29mUnited Airlines
Deal found 9/13$444
This Iberia deal was found by Cheapflights users on 9/14. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/255:20 pmMIA - OPO
1 stop17h 40mIberia
Tue 12/912:25 pmOPO - MIA
1 stop13h 20mIberia
Deal found 9/14$446
This Ticket deal was found by Cheapflights users on 9/13. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/244:35 pmMIA - FAO
1 stop26h 15mTAP AIR PORTUGAL
Sat 11/84:35 pmFAO - MIA
1 stop34h 30mTAP AIR PORTUGAL
Deal found 9/13$450
This Mytrip deal was found by Cheapflights users on 9/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/268:55 pmMIA - FAO
1 stop33h 05mScandinavian Airlines
Sat 11/85:10 pmFAO - MIA
1 stop29h 55mScandinavian Airlines
Deal found 9/14$465
This FlightHub deal was found by Cheapflights users on 9/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/147:00 amMIA - FNC
2 stops27h 20mScandinavian Airlines
Sat 11/224:10 pmFNC - MIA
1 stop30h 55mScandinavian Airlines
Deal found 9/13$472
This oojo deal was found by Cheapflights users on 9/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/144:30 pmMIA - FAO
1 stop26h 20mTAP AIR PORTUGAL
Tue 10/216:05 amFAO - MIA
1 stop13h 40mTAP AIR PORTUGAL
Deal found 9/15$475

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 September 15, 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

Tue 11/4

4:42 pm-9:30 am

1 stop11h 48m

Porto

Wed 11/12

12:35 pm-11:04 pm

1 stop15h 29m

$435

MiamiPorto

MIA - OPO

MIAOPO

Miami

Mon 10/27

7:00 am-9:30 am

1 stop22h 30m

Porto

Wed 11/12

6:00 am-11:59 pm

2 stops22h 59m

$458

MiamiPorto

MIA - OPO

MIAOPO

Miami

Tue 11/4

12:23 pm-9:30 am

2 stops16h 07m

Porto

Thu 11/13

12:35 pm-10:53 am

2 stops27h 18m

$460

MiamiPorto

MIA - OPO

MIAOPO

Miami

Wed 11/12

9:00 am-9:30 am

2 stops19h 30m

Porto

Thu 11/20

12:35 pm-11:04 pm

1 stop15h 29m

$461

MiamiFaro

MIA - FAO

MIAFAO

Miami

Sun 10/26

8:55 pm-10:00 am

1 stop33h 05m

Faro

Sat 11/8

5:10 pm-6:05 pm

1 stop29h 55m

$465

MiamiPorto

MIA - OPO

MIAOPO

Miami

Wed 11/5

10:40 pm-10:25 am

1 stop30h 45m

Porto

Wed 11/12

11:25 am-8:20 pm

1 stop13h 55m

$465

MiamiPorto

MIA - OPO

MIAOPO

Miami

Tue 11/4

7:50 pm-6:30 pm

1 stop17h 40m

Porto

Tue 11/11

1:45 pm-4:55 pm

1 stop32h 10m

$467

MiamiPorto

MIA - OPO

MIAOPO

Miami

Thu 11/6

7:00 am-9:30 am

2 stops21h 30m

Porto

Thu 11/13

12:35 pm-11:04 pm

1 stop15h 29m

$468

MiamiPorto

MIA - OPO

MIAOPO

Miami

Thu 11/6

4:42 pm-9:30 am

1 stop11h 48m

Porto

Fri 11/14

12:35 pm-11:04 pm

1 stop15h 29m

$468

MiamiPorto

MIA - OPO

MIAOPO

Miami

Tue 11/11

6:45 pm-12:50 pm

1 stop13h 05m

Porto

Tue 11/18

1:45 pm-4:55 pm

1 stop32h 10m

$469

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 60 results
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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 $1,127). 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 September 15, 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 September 15, 2025.

The most flights from KE9 to PT0 are scheduled on a Monday (6 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (2 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 September 15, 2025.
Read reviews from past customers who have flown Air Canada, TAP AIR PORTUGAL, and Air Europa 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.
Air Canada
7.1
Good
10,000 reviews

Food

6.3

Boarding

7.3

Comfort

7.1

Crew

7.8

Overall

7.1

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2024

TPA - YYZ

The pre boarding was a bit confusing but we got through it.
Air Canada
7.1
Good
10,000 reviews
Air Canada
7.1
Good
10,000 reviews

Food

6.3

Boarding

7.3

Comfort

7.1

Crew

7.8

Overall

7.1

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2024

TPA - YYZ

The pre boarding was a bit confusing but we got through it.
TAP AIR PORTUGAL
7.1
Good
1,975 reviews
Air Canada
7.1
Good
10,000 reviews

Food

6.3

Boarding

7.3

Comfort

7.1

Crew

7.8

Overall

7.1

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2024

TPA - YYZ

The pre boarding was a bit confusing but we got through it.
Air Europa
7.0
Good
556 reviews
Air Canada
7.1
Good
10,000 reviews

Food

6.3

Boarding

7.3

Comfort

7.1

Crew

7.8

Overall

7.1

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2024

TPA - YYZ

The pre boarding was a bit confusing but we got through it.
Iberia
7.0
Good
2,924 reviews
Air Canada
7.1
Good
10,000 reviews

Food

6.3

Boarding

7.3

Comfort

7.1

Crew

7.8

Overall

7.1

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2024

TPA - YYZ

The pre boarding was a bit confusing but we got through it.
British Airways
6.7
Okay
7,361 reviews
Air Canada
7.1
Good
10,000 reviews

Food

6.3

Boarding

7.3

Comfort

7.1

Crew

7.8

Overall

7.1

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Oct 2024

TPA - YYZ

The pre boarding was a bit confusing but we got through it.

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, 127 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 11h 48m. Fly via United Airlines, Scandinavian Airlines, or TAP AIR PORTUGAL to get the fastest option. Airlines will cover a distance of 4140 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 Scandinavian Airlines ($226), Iberia ($272), and Air Canada ($297).

  • 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 (56%), JetBlue (49%), TAP AIR PORTUGAL( 49%).

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

    The cheapest flight price from Key Largo to Portugal is $163. On average you can expect to pay $1,319. The most popular route, (Miami - Lisbon Humberto Delgado), can usually be booked for $392.

  • 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 $1,127). 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

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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest$370Average$659FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$371Average$458FlexibilityNo cancel feeOn-time77%
SWISSCheapest$377Average$559FlexibilityNo cancel feeOn-time79%
IberiaCheapest$406Average$688FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$439Average$855FlexibilityNo cancel feeOn-timeN/A
Air EuropaCheapest$453Average$666FlexibilityNo cancel feeOn-time83%
KLMCheapest$479Average$653FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$494Average$720FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$503Average$757FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$510Average$721FlexibilityNo cancel feeOn-time69%

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