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Portugal

$378+ Cheap flights from St. Louis (STL) 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 3/16. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LIS
Jan 22 — Jan 291
Wed 1/22
Wed 1/29
1 adult, Economy
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Cheap flight deals from St. Louis to Portugal

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Portugal (PT0). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 17, 2025.

Round-trip from

$534
(Mytrip)

One-way from

$378
(American Airlines)
From Lambert-St Louis to Portugal
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One-way flight from Lambert-St Louis to Portugal
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Find flight deals from St. Louis to Portugal

Cheapest flights from St. Louis to Portugal
Explore the most affordable flight options available from St. Louis to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 17, 2025.

This Mytrip deal was found by Cheapflights users on 1/16. 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 1/281:02 pmSTL - LIS
2 stops14h 18mMultiple Airlines
Wed 2/55:00 amLIS - STL
1 stop14h 55mMultiple Airlines
Deal found 1/16$534
This United deal was found by Cheapflights users on 1/16. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/38:25 amSTL - LIS
1 stop19h 50mUnited Airlines
Thu 3/1310:55 amLIS - STL
2 stops37h 55mUnited Airlines
Deal found 1/16$538
This Air Canada deal was found by Cheapflights users on 1/16. 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 3/35:36 pmSTL - LIS
2 stops33h 44mAir Canada
Thu 3/1310:55 amLIS - STL
2 stops32h 38mAir Canada
Deal found 1/16$543
This American Airlines deal was found by Cheapflights users on 1/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/116:00 pmSTL - LIS
2 stops17h 45mAmerican Airlines
Fri 2/2111:05 amLIS - STL
2 stops16h 58mAmerican Airlines
Deal found 1/15$556
This Expedia deal was found by Cheapflights users on 1/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/296:00 pmSTL - LIS
2 stops17h 45mBritish Airways
Wed 2/56:30 amLIS - STL
2 stops21h 39mBritish Airways
Deal found 1/16$563
This KLM deal was found by Cheapflights users on 1/15. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/1010:59 amSTL - LIS
2 stops15h 01mKLM
Thu 2/2010:00 amLIS - STL
2 stops19h 37mKLM
Deal found 1/15$571
This Delta deal was found by Cheapflights users on 1/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/111:35 pmSTL - LIS
1 stop12h 25mDelta
Tue 2/1810:00 amLIS - STL
1 stop17h 02mDelta
Deal found 1/15$583
This Lufthansa deal was found by Cheapflights users on 1/15. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/123:45 pmSTL - LIS
1 stop13h 40mLufthansa
Wed 2/195:00 amLIS - STL
1 stop14h 55mLufthansa
Deal found 1/15$591
This American Airlines deal was found by Cheapflights users on 1/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/99:25 amSTL - OPO
2 stops16h 15mAmerican Airlines
Tue 2/258:20 amOPO - STL
2 stops19h 42mAmerican Airlines
Deal found 1/15$612
This United Airlines deal was found by Cheapflights users on 1/15. 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.
Sun 2/93:45 pmSTL - OPO
1 stop17h 25mUnited Airlines
Tue 2/256:00 amOPO - STL
2 stops39h 06mUnited Airlines
Deal found 1/15$626
This Expedia deal was found by Cheapflights users on 1/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/93:45 pmSTL - OPO
1 stop17h 25mLufthansa
Tue 2/2512:30 pmOPO - STL
1 stop31h 25mLufthansa
Deal found 1/15$649
This Gotogate deal was found by Cheapflights users on 1/16. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/163:50 pmSTL - OPO
2 stops37h 25mMultiple Airlines
Sat 2/2212:30 pmOPO - STL
1 stop31h 25mMultiple Airlines
Deal found 1/16$671

Find flights from St. Louis to Portugal within your budget

Customize your flight search to find flights from St. Louis 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 January 17, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Tue 1/28

9:44 am-9:20 am

2 stops17h 36m

Lisbon Humberto Delgado

Wed 2/5

5:00 am-1:55 pm

1 stop14h 55m

$534

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Mon 3/3

8:25 am-10:15 am

1 stop19h 50m

Lisbon Humberto Delgado

Thu 3/13

10:55 am-7:50 pm

2 stops37h 55m

$538

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Mon 3/3

5:36 pm-9:20 am

2 stops33h 44m

Lisbon Humberto Delgado

Thu 3/13

10:55 am-2:33 pm

2 stops32h 38m

$543

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Tue 2/11

6:00 pm-5:45 pm

2 stops17h 45m

Lisbon Humberto Delgado

Fri 2/21

11:05 am-10:03 pm

2 stops16h 58m

$556

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Wed 1/29

6:00 pm-5:45 pm

2 stops17h 45m

Lisbon Humberto Delgado

Wed 2/5

6:30 am-10:09 pm

2 stops21h 39m

$563

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Mon 2/10

10:59 am-8:00 am

2 stops15h 01m

Lisbon Humberto Delgado

Thu 2/20

10:00 am-11:37 pm

2 stops19h 37m

$571

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Tue 2/11

6:06 am-8:00 am

1 stop19h 54m

Lisbon Humberto Delgado

Thu 2/20

10:00 am-9:02 pm

1 stop17h 02m

$583

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Wed 2/12

3:45 pm-11:25 am

1 stop13h 40m

Lisbon Humberto Delgado

Wed 2/19

5:00 am-1:55 pm

1 stop14h 55m

$591

St. LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Sun 2/9

9:25 am-7:40 am

2 stops16h 15m

Porto

Tue 2/25

8:20 am-10:02 pm

2 stops19h 42m

$612

St. LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Sun 2/9

3:45 pm-3:10 pm

1 stop17h 25m

Porto

Tue 2/25

6:00 am-3:06 pm

2 stops39h 06m

$626

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/15

Showing 1-10 of 24 results
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Best time to book a flight from St. Louis to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from St. Louis 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.

Travel insights for flights from St. Louis to Portugal

Get recent, data-driven insights about flights from St. Louis to Portugal including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from St. Louis to Portugal?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Portugal (average of $612). Flying from St. Louis to Portugal in June is currently the most expensive (average of $1,247). 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 STL to PT?

Find hourly flight availability from St. Louis 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 January 17, 2025.

When flying from St. Louis 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.

Rainfall in Portugal by month

Plan your trip to Portugal by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Portugal ranges from 0.2 - 4.8 inches per month. December is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Portugal when rainfall is around 0.2 in.

Temperature in Portugal by month

Plan your trip to Portugal by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Portugal, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

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 January 17, 2025.
To help decide which airline to fly from St. Louis to Portugal, see what other customers have to say about American Airlines, Lufthansa and United Airlines. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,511 reviews

Entertainment

7.9

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,511 reviews
Delta
8.0
Very good
8,511 reviews

Entertainment

7.9

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,339 reviews
Delta
8.0
Very good
8,511 reviews

Entertainment

7.9

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines
7.4
Good
8,964 reviews
Delta
8.0
Very good
8,511 reviews

Entertainment

7.9

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
8,511 reviews

Entertainment

7.9

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air Canada
7.0
Good
8,587 reviews
Delta
8.0
Very good
8,511 reviews

Entertainment

7.9

Overall

8.0

Crew

8.6

Comfort

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Portugal. 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 from for flights from St. Louis to Portugal?

    Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly out of when you book flights from St. Louis to Portugal.

  • What are the cheapest airlines to fly from St. Louis to Portugal one-way?

    For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $378. Users have also found prices from $382 and $391 on British Airways and Lufthansa, respectively.

  • What are the most popular routes from St. Louis to Portugal?

    When deciding which route to take from St. Louis to Portugal consider Lambert-St Louis - Lisbon Humberto Delgado, Lambert-St Louis - Porto or Lambert-St Louis - Lajes as they are the most popular.

  • Can I find deals for flights from St. Louis to Portugal that include hotel bookings?

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

  • How can I find direct flights from St. Louis to Portugal?

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

  • Can I find deals for business class flights from St. Louis to Portugal?

    Yes. Cheapflights offers flight deals from St. Louis 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 St. Louis to Portugal?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Portugal (average of $612). Flying from St. Louis to Portugal in June is currently the most expensive (average of $1,247). 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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Alternative routes for St. Louis to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from St. Louis to Portugal

Discover the top 7 airlines that operate flights from St. Louis 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 January 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$461Average$914FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$554Average$853FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$560Average$1,074FlexibilityNo cancel feeOn-time69%
IberiaCheapest$562Average$786FlexibilityNo cancel feeOn-time77%
DeltaCheapest$610Average$1,182FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$638Average$1,075FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$734Average$1,093FlexibilityNo cancel feeOn-time67%
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