$514+ 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 11/15. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — STL
Sep 11 — Sep 181
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
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
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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 August 12, 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 August 12, 2026.
This Iberia deal was found by Cheapflights users on 8/11. 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 9/112:25 pm -
2 stops17h 17m
Sun 9/1311:01 am -
2 stops18h 44m
Deal found 8/11![Iberia logo]()
$934
This Expedia deal was found by Cheapflights users on 8/9. 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 9/2312:30 pm -
2 stops25h 50m
Wed 9/306:30 am -
1 stop20h 35m
Deal found 8/9![Iberia logo]()
$937
This Iberia deal was found by Cheapflights users on 8/12. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/312:30 pm -
2 stops17h 12m
Mon 9/711:22 am -
1 stop15h 43m
Deal found 8/12![Multiple Airlines logo]()
$938
This Iberia deal was found by Cheapflights users on 8/8. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3111:05 am -
1 stop18h 29m
Mon 9/711:22 am -
1 stop15h 43m
Deal found 8/8![Iberia logo]()
$940
This Expedia deal was found by Cheapflights users on 8/9. 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.
Mon 9/78:45 pm -
2 stops32h 57m
Sun 9/136:30 am -
1 stop20h 35m
Deal found 8/9![Iberia logo]()
$958
This United Airlines deal was found by Cheapflights users on 8/11. 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 8/11![United Airlines logo]()
$963
This United Airlines deal was found by Cheapflights users on 8/8. 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.
Mon 8/315:05 am -
1 stop14h 20m
Mon 9/79:30 am -
2 stops19h 00m
Deal found 8/8![United Airlines logo]()
$966
This Lufthansa deal was found by Cheapflights users on 8/10. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/317:25 am -
2 stops17h 46m
Mon 9/712:27 pm -
1 stop13h 53m
Deal found 8/10![Lufthansa logo]()
$973
This Iberia deal was found by Cheapflights users on 8/8. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/318:25 am -
2 stops17h 02m
Mon 9/711:22 am -
1 stop15h 43m
Deal found 8/8![Multiple Airlines logo]()
$974
This Delta deal was found by Cheapflights users on 8/8. 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.
Mon 8/315:00 am -
2 stops21h 42m
Mon 9/75:34 pm -
2 stops15h 21m
Deal found 8/8![Delta logo]()
$977
This Lufthansa deal was found by Cheapflights users on 8/11. 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.
Tue 9/14:35 pm -
1 stop26h 50m
Sun 9/1312:25 pm -
1 stop15h 20m
Deal found 8/11![Lufthansa logo]()
$978
This Lufthansa deal was found by Cheapflights users on 8/8. 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.
Mon 9/75:05 am -
1 stop14h 20m
Sun 9/138:40 am -
1 stop19h 50m
Deal found 8/8![Lufthansa logo]()
$981
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 August 12, 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 August 12, 2026.
This Iberia deal was found by Cheapflights users on 8/11. 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 9/112:25 pm -
2 stops17h 17m
Sun 9/1311:01 am -
2 stops18h 44m
Deal found 8/11![Iberia logo]()
$934
This Iberia deal was found by Cheapflights users on 8/10. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/268:20 am -
2 stops21h 22m
Sun 8/309:40 pm -
1 stop16h 55m
Deal found 8/10![Multiple Airlines logo]()
$963
This United Airlines deal was found by Cheapflights users on 8/11. 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 8/11![United Airlines logo]()
$963
This Delta deal was found by Cheapflights users on 8/8. 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.
Mon 8/315:00 am -
2 stops21h 42m
Mon 9/75:34 pm -
2 stops15h 21m
Deal found 8/8![Delta logo]()
$977
This Lufthansa deal was found by Cheapflights users on 8/11. 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.
Tue 9/14:35 pm -
1 stop26h 50m
Sun 9/1312:25 pm -
1 stop15h 20m
Deal found 8/11![Lufthansa logo]()
$978
This American Airlines deal was found by Cheapflights users on 8/7. 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.
Sat 1/168:20 am -
2 stops16h 14m
Wed 1/206:00 am -
2 stops23h 45m
Deal found 8/7![American Airlines logo]()
$1,004
This United Airlines deal was found by Cheapflights users on 8/8. 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.
Mon 8/315:05 am -
1 stop14h 20m
Mon 9/79:30 am -
2 stops19h 00m
Deal found 8/8![United Airlines logo]()
$966
This Delta deal was found by Cheapflights users on 8/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:00 am -
2 stops21h 42m
Sun 8/302:10 pm -
2 stops19h 20m
Deal found 8/10![Delta logo]()
$982
This Delta deal was found by Cheapflights users on 8/12. 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.
Thu 9/35:00 am -
2 stops18h 38m
Mon 9/711:13 am -
2 stops21h 22m
Deal found 8/12![Delta logo]()
$993
This United Airlines deal was found by Cheapflights users on 8/11. 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 11/710:15 am -
2 stops18h 09m
Wed 11/113:15 pm -
2 stops13h 05m
Deal found 8/11![United Airlines logo]()
$998
This Delta deal was found by Cheapflights users on 8/12. 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.
Sat 9/265:00 am -
2 stops16h 14m
Sat 10/34:10 pm -
2 stops17h 15m
Deal found 8/12![Delta logo]()
$1,052
This United Airlines deal was found by Cheapflights users on 8/9. 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 8/2512:15 pm -
1 stop12h 27m
Sat 8/297:00 am -
1 stop17h 55m
Deal found 8/9![United Airlines logo]()
$1,078
Last-minute flights from Portugal to St. LouisDiscover last-minute flight deals from Portugal to St. Louis. Data last updated August 12, 2026 and is based on user searches.
Discover last-minute flight deals from Portugal to St. Louis. Data last updated August 12, 2026 and is based on user searches.
This Iberia deal was found by Cheapflights users on 8/10. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/268:20 am -
2 stops21h 22m
Sun 8/309:40 pm -
1 stop16h 55m
Deal found 8/10![Multiple Airlines logo]()
$963
This Iberia deal was found by Cheapflights users on 8/8. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3111:05 am -
1 stop18h 29m
Mon 9/711:22 am -
1 stop15h 43m
Deal found 8/8![Iberia logo]()
$940
This United Airlines deal was found by Cheapflights users on 8/8. 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.
Mon 8/315:05 am -
1 stop14h 20m
Mon 9/79:30 am -
2 stops19h 00m
Deal found 8/8![United Airlines logo]()
$966
This Lufthansa deal was found by Cheapflights users on 8/10. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/317:25 am -
2 stops17h 46m
Mon 9/712:27 pm -
1 stop13h 53m
Deal found 8/10![Lufthansa logo]()
$973
This Iberia deal was found by Cheapflights users on 8/8. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/318:25 am -
2 stops17h 02m
Mon 9/711:22 am -
1 stop15h 43m
Deal found 8/8![Multiple Airlines logo]()
$974
This Delta deal was found by Cheapflights users on 8/8. 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.
Mon 8/315:00 am -
2 stops21h 42m
Mon 9/75:34 pm -
2 stops15h 21m
Deal found 8/8![Delta logo]()
$977
This Iberia deal was found by Cheapflights users on 8/11. 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 9/112:25 pm -
2 stops17h 17m
Sun 9/1311:01 am -
2 stops18h 44m
Deal found 8/11![Iberia logo]()
$934
This Lufthansa deal was found by Cheapflights users on 8/11. 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.
Tue 9/14:35 pm -
1 stop26h 50m
Sun 9/1312:25 pm -
1 stop15h 20m
Deal found 8/11![Lufthansa logo]()
$978
This Iberia deal was found by Cheapflights users on 8/12. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/312:30 pm -
2 stops17h 12m
Mon 9/711:22 am -
1 stop15h 43m
Deal found 8/12![Multiple Airlines logo]()
$938
This Expedia deal was found by Cheapflights users on 8/9. 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.
Mon 9/78:45 pm -
2 stops32h 57m
Sun 9/136:30 am -
1 stop20h 35m
Deal found 8/9![Iberia logo]()
$958
This Lufthansa deal was found by Cheapflights users on 8/8. 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.
Mon 9/75:05 am -
1 stop14h 20m
Sun 9/138:40 am -
1 stop19h 50m
Deal found 8/8![Lufthansa logo]()
$981
This Expedia deal was found by Cheapflights users on 8/9. 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 9/2312:30 pm -
2 stops25h 50m
Wed 9/306:30 am -
1 stop20h 35m
Deal found 8/9![Iberia logo]()
$937
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 August 12, 2026.
Search for one-way flight options from Portugal to St. Louis. Find affordable one-way fares based on user searches. Data last updated August 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 11/157:05 am -
3 stops56h 35m
Deal found 8/7![Multiple Airlines logo]()
$514
This Iberia deal was found by Cheapflights users on 8/12. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:35 am -
2 stops20h 22m
Deal found 8/12![Iberia logo]()
$549
This Iberia deal was found by Cheapflights users on 8/7. 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.
Sun 11/1511:05 am -
1 stop15h 21m
Deal found 8/7![Iberia logo]()
$560
This Kiwi.com deal was found by Cheapflights users on 8/11. 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 9/256:20 am -
3 stops42h 57m
Deal found 8/11![Multiple Airlines logo]()
$582
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/158:55 pm -
3 stops43h 43m
Deal found 8/12![Multiple Airlines logo]()
$606
This Kiwi.com deal was found by Cheapflights users on 8/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/66:40 pm -
3 stops43h 32m
Deal found 8/10![Multiple Airlines logo]()
$650
This British Airways deal was found by Cheapflights users on 8/11. 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.
Sun 10/187:20 am -
2 stops19h 37m
Deal found 8/11![British Airways logo]()
$658
This Kiwi.com deal was found by Cheapflights users on 8/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/410:00 pm -
3 stops45h 45m
Deal found 8/10![Multiple Airlines logo]()
$680
This Iberia deal was found by Cheapflights users on 8/12. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/248:20 am -
2 stops18h 24m
Deal found 8/12![Iberia logo]()
$791
This Ovago deal was found by Cheapflights users on 8/11. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/246:05 pm -
1 stop20h 43m
Deal found 8/11![TAP AIR PORTUGAL logo]()
$871
This United Airlines deal was found by Cheapflights users on 8/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2412:35 pm -
3 stops29h 38m
Deal found 8/10![United Airlines logo]()
$1,052
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 August 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $934 (Iberia) |
One-way from | $514 (Kiwi.com) |
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 August 12, 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
PortoSt. Louis
OPO Porto - STL Lambert-St Louis
OPOSTL
Porto
Tue 9/1
12:25 pm-11:42 pm
2 stops17h 17m
Lambert-St Louis
Sun 9/13
11:01 am-11:45 am
2 stops18h 44m
$934
PortoSt. Louis
OPO Porto - STL Lambert-St Louis
OPOSTL
Porto
Wed 8/26
8:20 am-11:42 pm
2 stops21h 22m
Lambert-St Louis
Sun 8/30
9:40 pm-8:35 pm
1 stop16h 55m
$963
PortoSt. Louis
OPO Porto - STL Lambert-St Louis
OPOSTL
Porto
Thu 11/12
6:00 am-11:24 pm
2 stops23h 24m
Lambert-St Louis
Mon 11/16
11:29 am-9:30 am
1 stop16h 01m
$963
LisbonSt. Louis
LIS Lisbon Humberto Delgado - STL Lambert-St Louis
LISSTL
Lisbon Humberto Delgado
Mon 8/31
5:05 am-1:25 pm
1 stop14h 20m
Lambert-St Louis
Mon 9/7
9:30 am-10:30 am
2 stops19h 00m
$966
LisbonSt. Louis
LIS Lisbon Humberto Delgado - STL Lambert-St Louis
LISSTL
Lisbon Humberto Delgado
Mon 8/31
5:00 am-8:42 pm
2 stops21h 42m
Lambert-St Louis
Mon 9/7
5:34 pm-2:55 pm
2 stops15h 21m
$977
PortoSt. Louis
OPO Porto - STL Lambert-St Louis
OPOSTL
Porto
Tue 9/1
4:35 pm-1:25 pm
1 stop26h 50m
Lambert-St Louis
Sun 9/13
12:25 pm-9:45 am
1 stop15h 20m
$978
PortoSt. Louis
OPO Porto - STL Lambert-St Louis
OPOSTL
Porto
Wed 8/26
5:00 am-8:42 pm
2 stops21h 42m
Lambert-St Louis
Sun 8/30
2:10 pm-3:30 pm
2 stops19h 20m
$982
LisbonSt. Louis
LIS Lisbon Humberto Delgado - STL Lambert-St Louis
LISSTL
Lisbon Humberto Delgado
Thu 9/3
5:00 am-5:38 pm
2 stops18h 38m
Lambert-St Louis
Mon 9/7
11:13 am-2:35 pm
2 stops21h 22m
$993
LisbonSt. Louis
LIS Lisbon Humberto Delgado - STL Lambert-St Louis
LISSTL
Lisbon Humberto Delgado
Sat 11/7
10:15 am-10:24 pm
2 stops18h 09m
Lambert-St Louis
Wed 11/11
3:15 pm-10:20 am
2 stops13h 05m
$998
PortoSt. Louis
OPO Porto - STL Lambert-St Louis
OPOSTL
Porto
Sat 1/16
8:20 am-6:34 pm
2 stops16h 14m
Lambert-St Louis
Wed 1/20
6:00 am-11:45 am
2 stops23h 45m
$1,004
Showing 1-10 of 25 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.
OPO-STL
LIS-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
OPO-STL
LIS-STL
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Book flights to St. Louis if you plan to visit one of these locationsEdwardsville
Fairview Heights
O'Fallon
Fenton
Swansea
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Farmington
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