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St. Louis

$558+ Cheap flights from Portugal to St. Louis (STL)

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 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — STL
Jun 12 — Jun 191
Fri 6/12
Fri 6/19
1 adult, Economy
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Cheap flight deals from Portugal to St. Louis

Cheapest flights from Portugal to St. Louis
Explore the most affordable flight options available from Portugal to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 13, 2026.

This Gotogate deal was found by Cheapflights users on 5/12. 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.
Fri 5/295:05 am
LIS
-
STL
1 stop14h 20m
Multiple Airlines
Tue 6/22:15 pm
STL
-
LIS
1 stop14h 50m
Multiple Airlines
Deal found 5/12$947
This United Airlines deal was found by Cheapflights users on 5/13. 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.
Fri 5/295:05 am
LIS
-
STL
1 stop14h 20m
United Airlines
Tue 6/26:00 am
STL
-
LIS
1 stop20h 20m
United Airlines
Deal found 5/13$964
This Lufthansa deal was found by Cheapflights users on 5/8. 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.
Fri 5/295:05 am
LIS
-
STL
1 stop14h 20m
Lufthansa
Tue 6/212:22 pm
STL
-
LIS
1 stop13h 58m
Lufthansa
Deal found 5/8$965
This Delta deal was found by Cheapflights users on 5/8. 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.
Sat 5/235:00 am
OPO
-
STL
2 stops22h 09m
Delta
Wed 5/275:36 pm
STL
-
OPO
2 stops15h 49m
Delta
Deal found 5/8$968
This Delta deal was found by Cheapflights users on 5/12. 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.
Fri 5/295:00 am
LIS
-
STL
2 stops18h 16m
Delta
Tue 6/24:25 pm
STL
-
LIS
2 stops19h 25m
Delta
Deal found 5/12$977
This United Airlines deal was found by Cheapflights users on 5/12. 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.
Thu 10/811:50 am
OPO
-
STL
1 stop12h 51m
United Airlines
Mon 10/1211:59 am
STL
-
OPO
1 stop15h 46m
United Airlines
Deal found 5/12$983
This United Airlines deal was found by Cheapflights users on 5/8. 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.
Sat 5/2312:35 pm
OPO
-
STL
1 stop17h 00m
United Airlines
Wed 5/2712:23 pm
STL
-
OPO
1 stop12h 32m
United Airlines
Deal found 5/8$986
This United Airlines deal was found by Cheapflights users on 5/12. 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.
Thu 10/1511:25 am
LIS
-
STL
1 stop13h 16m
United Airlines
Mon 10/1911:45 am
STL
-
LIS
2 stops14h 35m
United Airlines
Deal found 5/12$994
This American Airlines deal was found by Cheapflights users on 5/12. 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 10/88:20 am
OPO
-
STL
2 stops17h 48m
American Airlines
Mon 10/127:35 am
STL
-
OPO
2 stops18h 05m
American Airlines
Deal found 5/12$1,002
This oojo deal was found by Cheapflights users on 5/10. 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 6/186:10 am
LIS
-
STL
2 stops33h 22m
WestJet
Sun 7/56:30 am
STL
-
LIS
2 stops33h 15m
WestJet
Deal found 5/10$1,067
This Mytrip deal was found by Cheapflights users on 5/10. 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.
Thu 6/188:15 am
LIS
-
STL
2 stops34h 06m
Multiple Airlines
Sun 7/512:10 pm
STL
-
LIS
1 stop15h 10m
Multiple Airlines
Deal found 5/10$1,111
This Mytrip deal was found by Cheapflights users on 5/8. 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.
Sat 5/236:00 am
OPO
-
STL
2 stops20h 09m
Multiple Airlines
Wed 5/279:14 am
STL
-
OPO
3 stops20h 41m
Multiple Airlines
Deal found 5/8$1,757

Find flight deals from Portugal to St. Louis

Keep the following information in mind while searching for Portugal to St. Louis flight deals. Data was last updated May 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$947
(Gotogate)

One-way from

$558
(Kiwi.com)
Provider with most accurate pricing for Lisbon Humberto Delgado-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lisbon Humberto Delgado-Lambert-St Louis flights.
Search Deals
From Portugal to Lambert-St Louis
Search Deals
One-way flight from Portugal to Lambert-St Louis
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portugal to St. Louis 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 May 13, 2026.
Use the filters below to find and compare flights from Portugal to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LisbonSt. Louis

LIS - STL

LISSTL

Lisbon Humberto Delgado

Fri 5/29

5:05 am-1:25 pm

1 stop14h 20m

Lambert-St Louis

Tue 6/2

6:00 am-8:20 am

1 stop20h 20m

$964

LisbonSt. Louis

LIS - STL

LISSTL

Lisbon Humberto Delgado

Fri 5/29

5:05 am-1:25 pm

1 stop14h 20m

Lambert-St Louis

Tue 6/2

12:22 pm-8:20 am

1 stop13h 58m

$965

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Sat 5/23

5:00 am-9:09 pm

2 stops22h 09m

Lambert-St Louis

Wed 5/27

5:36 pm-3:25 pm

2 stops15h 49m

$968

LisbonSt. Louis

LIS - STL

LISSTL

Lisbon Humberto Delgado

Fri 5/29

5:00 am-5:16 pm

2 stops18h 16m

Lambert-St Louis

Tue 6/2

4:25 pm-5:50 pm

2 stops19h 25m

$977

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Thu 10/8

11:50 am-6:41 pm

1 stop12h 51m

Lambert-St Louis

Mon 10/12

8:25 am-9:45 am

2 stops19h 20m

$983

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Sat 5/23

12:35 pm-11:35 pm

1 stop17h 00m

Lambert-St Louis

Wed 5/27

12:23 pm-6:55 am

1 stop12h 32m

$986
Quickest round-trip

LisbonSt. Louis

LIS - STL

LISSTL

Lisbon Humberto Delgado

Thu 10/15

11:25 am-6:41 pm

1 stop13h 16m

Lambert-St Louis

Mon 10/19

11:59 am-8:20 am

1 stop14h 21m

$994

LisbonSt. Louis

LIS - STL

LISSTL

Lisbon Humberto Delgado

Wed 6/24

5:05 am-1:25 pm

1 stop14h 20m

Lambert-St Louis

Wed 7/1

12:55 pm-10:30 am

1 stop15h 35m

$1,156

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Sat 5/23

6:00 am-8:09 pm

2 stops20h 09m

Lambert-St Louis

Wed 5/27

9:14 am-11:55 am

3 stops20h 41m

$1,757

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Tue 8/4

9:00 am-4:07 pm

1 stop13h 07m

Lambert-St Louis

Tue 8/4

7:05 pm-6:55 am

2 stops29h 50m

$1,965

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/8

Showing 1-10 of 25 resultsSorted by cheapest first
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Best time to book a flight from Portugal to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Portugal 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 Portugal to St. Louis
No data available for this route at this time. Please check back soon.

Related info for your journey

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

    Lambert-St Louis (STL) is the airport you will fly into if you book a flight from Portugal to St. Louis. It is only a 12.7 mi journey from Lambert-St Louis (STL) to St. Louis’s city center.

  • How long is the flight from Portugal to St. Louis?

    Departing from Portugal to St. Louis will take you 14h 20m. Airlines will cover a distance of 4212 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Portugal to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

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