$643+ Cheap flights from Portugal to St. Louis (STL)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/21. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — STL
Oct 23 — Oct 301
Round-trip
1 adult, Economy
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Find cheap flights from Portugal to St. Louis 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
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Best
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Cheapest flights from Portugal to St. LouisExplore 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 September 23, 2026.
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 September 23, 2026.
This American Airlines deal was found by Cheapflights users on 9/22. 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.
Fri 11/66:30 am -
2 stops17h 47m
Tue 11/101:58 pm -
2 stops16h 07m
Deal found 9/22![American Airlines logo]()
$869
This lol.travel deal was found by Cheapflights users on 9/19. 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.
Thu 10/2910:40 am -
2 stops18h 39m
Mon 11/21:15 pm -
1 stop13h 50m
Deal found 9/19![British Airways logo]()
$870
This American Airlines deal was found by Cheapflights users on 9/18. 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 11/128:20 am -
2 stops39h 27m
Mon 11/165:29 pm -
2 stops40h 31m
Deal found 9/18![American Airlines logo]()
$876
This Iberia deal was found by Cheapflights users on 9/20. 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 10/296:30 am -
2 stops19h 27m
Mon 11/21:15 pm -
1 stop13h 50m
Deal found 9/20![Iberia logo]()
$877
This American Airlines deal was found by Cheapflights users on 9/19. 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 10/2911:05 am -
2 stops18h 14m
Mon 11/25:29 pm -
2 stops15h 26m
Deal found 9/19![American Airlines logo]()
$879
This Delta deal was found by Cheapflights users on 9/20. 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.
Thu 10/295:30 am -
2 stops20h 21m
Mon 11/22:25 pm -
2 stops21h 05m
Deal found 9/20![Delta logo]()
$881
This Delta deal was found by Cheapflights users on 9/22. 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.
Thu 10/2911:30 am -
2 stops17h 24m
Tue 11/36:47 am -
2 stops22h 38m
Deal found 9/22![Delta logo]()
$882
This United Airlines deal was found by Cheapflights users on 9/18. 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 11/126:00 am -
2 stops23h 24m
Mon 11/1611:29 am -
1 stop16h 01m
Deal found 9/18![United Airlines logo]()
$958
Best flights from Portugal to St. LouisDiscover carefully curated flight deals from Portugal to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 23, 2026.
Discover carefully curated flight deals from Portugal to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 23, 2026.
This American Airlines deal was found by Cheapflights users on 9/19. 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.
Fri 11/66:30 am -
2 stops17h 47m
Tue 11/101:58 pm -
2 stops16h 07m
Deal found 9/19![American Airlines logo]()
$871
This Iberia deal was found by Cheapflights users on 9/20. 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 10/296:30 am -
2 stops19h 27m
Mon 11/21:15 pm -
1 stop13h 50m
Deal found 9/20![Iberia logo]()
$877
This British Airways deal was found by Cheapflights users on 9/23. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2111:05 am -
1 stop16h 42m
Sun 1/311:09 am -
2 stops18h 56m
Deal found 9/23![British Airways logo]()
$879
This Delta deal was found by Cheapflights users on 9/20. 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.
Thu 10/295:30 am -
2 stops20h 21m
Mon 11/22:25 pm -
2 stops21h 05m
Deal found 9/20![Delta logo]()
$881
This United Airlines deal was found by Cheapflights users on 9/18. 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 11/126:00 am -
2 stops23h 24m
Mon 11/1611:29 am -
1 stop16h 01m
Deal found 9/18![United Airlines logo]()
$958
This American Airlines deal was found by Cheapflights users on 9/18. 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 1/146:30 am -
2 stops17h 59m
Mon 1/181:58 pm -
2 stops22h 52m
Deal found 9/18![American Airlines logo]()
$872
This British Airways deal was found by Cheapflights users on 9/23. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1910:40 am -
1 stop17h 07m
Mon 1/410:00 am -
2 stops20h 05m
Deal found 9/23![British Airways logo]()
$879
This Iberia deal was found by Cheapflights users on 9/21. 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 1/1412:25 pm -
2 stops27h 02m
Mon 1/181:38 pm -
2 stops16h 07m
Deal found 9/21![Iberia logo]()
$910
This American Airlines deal was found by Cheapflights users on 9/22. 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 1/1412:25 pm -
2 stops27h 02m
Mon 1/187:34 am -
2 stops26h 26m
Deal found 9/22![American Airlines logo]()
$874
This British Airways deal was found by Cheapflights users on 9/18. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/1411:05 am -
1 stop15h 19m
Mon 1/185:37 pm -
2 stops15h 18m
Deal found 9/18![British Airways logo]()
$881
This American Airlines deal was found by Cheapflights users on 9/18. 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 11/128:20 am -
2 stops39h 27m
Mon 11/165:29 pm -
2 stops40h 31m
Deal found 9/18![American Airlines logo]()
$876
This British Airways deal was found by Cheapflights users on 9/20. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2911:05 am -
1 stop16h 09m
Mon 11/21:15 pm -
1 stop13h 50m
Deal found 9/20![British Airways logo]()
$886
This American Airlines deal was found by Cheapflights users on 9/22. 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 10/2911:05 am -
2 stops17h 37m
Mon 11/25:29 pm -
2 stops15h 26m
Deal found 9/22![American Airlines logo]()
$879
Last-minute flights from Portugal to St. LouisDiscover last-minute flight deals from Portugal to St. Louis. Data last updated September 23, 2026 and is based on user searches.
Discover last-minute flight deals from Portugal to St. Louis. Data last updated September 23, 2026 and is based on user searches.
This lol.travel deal was found by Cheapflights users on 9/19. 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.
Thu 10/2910:40 am -
2 stops18h 39m
Mon 11/21:15 pm -
1 stop13h 50m
Deal found 9/19![British Airways logo]()
$870
This Iberia deal was found by Cheapflights users on 9/20. 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 10/296:30 am -
2 stops19h 27m
Mon 11/21:15 pm -
1 stop13h 50m
Deal found 9/20![Iberia logo]()
$877
This American Airlines deal was found by Cheapflights users on 9/19. 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 10/2911:05 am -
2 stops18h 14m
Mon 11/25:29 pm -
2 stops15h 26m
Deal found 9/19![American Airlines logo]()
$879
This Delta deal was found by Cheapflights users on 9/20. 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.
Thu 10/295:30 am -
2 stops20h 21m
Mon 11/22:25 pm -
2 stops21h 05m
Deal found 9/20![Delta logo]()
$881
This Delta deal was found by Cheapflights users on 9/22. 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.
Thu 10/2911:30 am -
2 stops17h 24m
Tue 11/36:47 am -
2 stops22h 38m
Deal found 9/22![Delta logo]()
$882
This Mytrip deal was found by Cheapflights users on 9/19. 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 10/291:00 pm -
2 stops30h 45m
Mon 11/24:05 pm -
3 stops24h 20m
Deal found 9/19![Multiple Airlines logo]()
$1,834
One-way flights from Portugal to St. LouisSearch for one-way flight options from Portugal to St. Louis. Find affordable one-way fares based on user searches. Data last updated September 23, 2026.
Search for one-way flight options from Portugal to St. Louis. Find affordable one-way fares based on user searches. Data last updated September 23, 2026.
This Delta deal was found by Cheapflights users on 9/20. 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.
Sun 3/215:30 am -
2 stops22h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Delta logo]()
$643
This American Airlines deal was found by Cheapflights users on 9/20. 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.
Fri 3/1911:05 am -
1 stop30h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![American Airlines logo]()
$652
This British Airways deal was found by Cheapflights users on 9/20. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/206:30 am -
2 stops18h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Multiple Airlines logo]()
$674
This Kiwi.com deal was found by Cheapflights users on 9/20. 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.
Sun 3/216:55 am -
3 stops46h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Multiple Airlines logo]()
$718
This deal was found by Cheapflights users on 9/21. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2412:20 pm -
1 stop13h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![United Airlines logo]()
$910
This KAYAK deal was found by Cheapflights users on 9/20. 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.
Sat 3/2011:05 am -
1 stop16h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Iberia logo]()
$943
This Kiwi.com deal was found by Cheapflights users on 9/20. 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.
Fri 3/1910:50 am -
3 stops35h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Multiple Airlines logo]()
$1,034
This United Airlines deal was found by Cheapflights users on 9/20. 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 3/2112:20 pm -
1 stop26h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![United Airlines logo]()
$1,045
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 September 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $869 (American Airlines) |
One-way from | $643 (Delta) |
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 7,457,451 searches. Data last updated September 23, 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
Cheapest round-trip
LisbonSt. Louis
LIS Lisbon Humberto Delgado - STL Lambert-St Louis
LISSTL
Lisbon Humberto Delgado
Sun 3/21
5:30 am-11:18 pm
2 stops22h 48m
Lambert-St Louis
Wed 12/31
12:00 am-7:00 am
Nonstop0h 00m
$643
LisbonSt. Louis
LIS Lisbon Humberto Delgado - STL Lambert-St Louis
LISSTL
Lisbon Humberto Delgado
Sat 3/20
6:30 am-7:30 pm
2 stops18h 00m
Lambert-St Louis
Wed 12/31
12:00 am-7:00 am
Nonstop0h 00m
$674
LisbonSt. Louis
LIS Lisbon Humberto Delgado - STL Lambert-St Louis
LISSTL
Lisbon Humberto Delgado
Sun 3/21
6:55 am-12:04 am
3 stops46h 09m
Lambert-St Louis
Wed 12/31
12:00 am-7:00 am
Nonstop0h 00m
$718
LisbonSt. Louis
LIS Lisbon Humberto Delgado - STL Lambert-St Louis
LISSTL
Lisbon Humberto Delgado
Fri 11/6
6:30 am-6:17 pm
2 stops17h 47m
Lambert-St Louis
Tue 11/10
1:58 pm-12:05 pm
2 stops16h 07m
$871
LisbonSt. Louis
LIS Lisbon Humberto Delgado - STL Lambert-St Louis
LISSTL
Lisbon Humberto Delgado
Thu 1/14
6:30 am-6:29 pm
2 stops17h 59m
Lambert-St Louis
Mon 1/18
1:58 pm-6:50 pm
2 stops22h 52m
$872
PortoSt. Louis
OPO Porto - STL Lambert-St Louis
OPOSTL
Porto
Thu 1/14
12:25 pm-9:27 am
2 stops27h 02m
Lambert-St Louis
Mon 1/18
7:34 am-4:00 pm
2 stops26h 26m
$874
PortoSt. Louis
OPO Porto - STL Lambert-St Louis
OPOSTL
Porto
Thu 11/12
8:20 am-5:47 pm
2 stops39h 27m
Lambert-St Louis
Mon 11/16
5:29 pm-4:00 pm
2 stops40h 31m
$876
LisbonSt. Louis
LIS Lisbon Humberto Delgado - STL Lambert-St Louis
LISSTL
Lisbon Humberto Delgado
Thu 10/29
6:30 am-8:57 pm
2 stops19h 27m
Lambert-St Louis
Mon 11/2
1:15 pm-9:05 am
1 stop13h 50m
$877
LisbonSt. Louis
LIS Lisbon Humberto Delgado - STL Lambert-St Louis
LISSTL
Lisbon Humberto Delgado
Mon 12/21
11:05 am-9:47 pm
1 stop16h 42m
Lambert-St Louis
Sun 1/3
11:09 am-12:05 pm
2 stops18h 56m
$879
LisbonSt. Louis
LIS Lisbon Humberto Delgado - STL Lambert-St Louis
LISSTL
Lisbon Humberto Delgado
Sat 12/19
10:40 am-9:47 pm
1 stop17h 07m
Lambert-St Louis
Mon 1/4
10:00 am-12:05 pm
2 stops20h 05m
$879
Showing 1-10 of 19 resultsSorted by cheapest first
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.
LIS-STL
OPO-STL
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
PT0-STL
LIS-STL
OPO-STL
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.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsFairview Heights
O'Fallon
Fenton
Swansea
Eureka
Wentzville
Maryland Heights
Collinsville
Edwardsville
Glencoe
Chesterfield
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