$342+ 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 3/20. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LIS
Mar 13 — Mar 201
1 adult, Economy
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Find cheap flights from St. Louis to Portugal 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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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Portugal
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Cheapest flights from St. Louis to PortugalExplore 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 February 11, 2026.
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 February 11, 2026.
This Mytrip deal was found by Cheapflights users on 2/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/44:15 pm
STL
- LIS
2 stops35h 05m
Multiple Airlines
Wed 11/255:00 am
LIS
- STL
1 stop14h 55m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$473
This United Airlines deal was found by Cheapflights users on 2/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/37:30 am
STL
- LIS
2 stops19h 50m
United Airlines
Mon 11/95:00 am
LIS
- STL
2 stops33h 37m
United Airlines
Deal found 2/7![United Airlines logo]()
$499
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Mon 4/2010:00 am
STL
- LIS
2 stops18h 30m
United Airlines
Fri 5/15:05 am
LIS
- STL
2 stops23h 54m
United Airlines
Deal found 2/10![United Airlines logo]()
$500
This Orbitz deal was found by Cheapflights users on 2/10. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/118:02 pm
STL
- OPO
2 stops33h 43m
Iberia
Wed 4/228:20 am
OPO
- STL
2 stops19h 57m
Iberia
Deal found 2/10![Iberia logo]()
$500
This Delta deal was found by Cheapflights users on 2/10. 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.
Tue 3/103:05 pm
STL
- LIS
2 stops21h 25m
Delta
Tue 3/175:00 am
LIS
- STL
2 stops20h 42m
Delta
Deal found 2/10![Delta logo]()
$503
This oojo deal was found by Cheapflights users on 2/10. 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.
Sun 4/196:11 pm
STL
- LIS
2 stops22h 54m
British Airways
Tue 4/286:45 pm
LIS
- STL
1 stop30h 45m
British Airways
Deal found 2/10![British Airways logo]()
$506
This Delta deal was found by Cheapflights users on 2/10. 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.
Tue 4/1412:45 pm
STL
- LIS
1 stop13h 15m
Delta
Tue 4/2110:00 am
LIS
- STL
1 stop15h 26m
Delta
Deal found 2/10![Delta logo]()
$508
This oojo deal was found by Cheapflights users on 2/10. 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.
Mon 4/206:55 pm
STL
- LIS
2 stops22h 15m
British Airways
Fri 5/17:20 am
LIS
- STL
2 stops20h 57m
British Airways
Deal found 2/10![British Airways logo]()
$509
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Tue 4/218:30 am
STL
- LIS
2 stops18h 50m
United Airlines
Fri 5/81:00 pm
LIS
- STL
1 stop29h 06m
United Airlines
Deal found 2/10![United Airlines logo]()
$510
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Mon 4/207:45 am
STL
- LIS
2 stops20h 45m
United Airlines
Fri 5/81:00 pm
LIS
- STL
1 stop29h 06m
United Airlines
Deal found 2/10![United Airlines logo]()
$511
This Delta deal was found by Cheapflights users on 2/10. 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.
Mon 4/135:27 pm
STL
- LIS
1 stop32h 33m
Delta
Wed 4/2210:00 am
LIS
- STL
1 stop15h 26m
Delta
Deal found 2/10![Delta logo]()
$513
This Delta deal was found by Cheapflights users on 2/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/42:18 pm
STL
- LIS
2 stops18h 17m
Delta
Tue 11/105:30 am
LIS
- STL
2 stops17h 36m
Delta
Deal found 2/9![Delta logo]()
$514
Best flights from St. Louis to PortugalDiscover carefully curated flight deals from St. Louis to Portugal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 11, 2026.
Discover carefully curated flight deals from St. Louis to Portugal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 11, 2026.
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Mon 4/209:10 am
STL
- LIS
2 stops19h 20m
United Airlines
Sun 5/107:25 am
LIS
- STL
2 stops19h 43m
United Airlines
Deal found 2/10![United Airlines logo]()
$500
This Orbitz deal was found by Cheapflights users on 2/10. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/118:02 pm
STL
- OPO
2 stops33h 43m
Iberia
Wed 4/228:20 am
OPO
- STL
2 stops19h 57m
Iberia
Deal found 2/10![Iberia logo]()
$500
This Delta deal was found by Cheapflights users on 2/10. 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.
Tue 4/1412:45 pm
STL
- LIS
1 stop13h 15m
Delta
Tue 4/2112:45 pm
LIS
- STL
2 stops25h 45m
Delta
Deal found 2/10![Delta logo]()
$512
This American Airlines deal was found by Cheapflights users on 2/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/157:00 am
STL
- OPO
2 stops18h 40m
American Airlines
Wed 4/228:20 am
OPO
- STL
2 stops17h 13m
American Airlines
Deal found 2/9![American Airlines logo]()
$596
This KAYAK deal was found by Cheapflights users on 2/7. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/83:30 pm
STL
- OPO
1 stop18h 10m
Lufthansa
Mon 4/1312:10 pm
OPO
- STL
2 stops38h 58m
Lufthansa
Deal found 2/7![Lufthansa logo]()
$704
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Tue 4/218:30 am
STL
- LIS
2 stops18h 50m
United Airlines
Fri 5/81:00 pm
LIS
- STL
1 stop29h 06m
United Airlines
Deal found 2/10![United Airlines logo]()
$510
This Delta deal was found by Cheapflights users on 2/10. 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.
Mon 4/135:27 pm
STL
- LIS
1 stop32h 33m
Delta
Wed 4/2210:00 am
LIS
- STL
1 stop15h 26m
Delta
Deal found 2/10![Delta logo]()
$513
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Mon 4/207:45 am
STL
- LIS
2 stops20h 45m
United Airlines
Fri 5/81:00 pm
LIS
- STL
1 stop29h 06m
United Airlines
Deal found 2/10![United Airlines logo]()
$511
This Delta deal was found by Cheapflights users on 2/10. 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.
Mon 4/135:27 pm
STL
- LIS
1 stop32h 33m
Delta
Tue 4/2110:00 am
LIS
- STL
2 stops16h 42m
Delta
Deal found 2/10![Delta logo]()
$518
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Mon 4/2010:00 am
STL
- LIS
2 stops18h 30m
United Airlines
Fri 5/11:00 pm
LIS
- STL
1 stop29h 06m
United Airlines
Deal found 2/10![United Airlines logo]()
$516
This Delta deal was found by Cheapflights users on 2/10. 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.
Mon 4/2012:45 pm
STL
- LIS
1 stop13h 15m
Delta
Sat 5/95:00 am
LIS
- STL
2 stops24h 21m
Delta
Deal found 2/10![Delta logo]()
$547
This Delta deal was found by Cheapflights users on 2/10. 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.
Tue 4/216:25 am
STL
- LIS
2 stops22h 20m
Delta
Sat 5/95:00 am
LIS
- STL
2 stops24h 59m
Delta
Deal found 2/10![Delta logo]()
$552
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Sun 4/58:30 am
STL
- LIS
1 stop20h 00m
United Airlines
Wed 4/155:05 am
LIS
- STL
1 stop14h 20m
United Airlines
Deal found 2/9![United Airlines logo]()
$559
This Delta deal was found by Cheapflights users on 2/10. 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.
Tue 4/216:25 am
STL
- LIS
2 stops22h 20m
Delta
Sun 5/105:35 am
LIS
- STL
2 stops17h 30m
Delta
Deal found 2/10![Delta logo]()
$559
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Tue 3/2410:00 am
STL
- OPO
2 stops18h 30m
United Airlines
Tue 3/3112:05 pm
OPO
- STL
2 stops38h 49m
United Airlines
Deal found 2/8![United Airlines logo]()
$658
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Wed 2/258:41 am
STL
- OPO
2 stops18h 49m
United Airlines
Sun 3/16:00 am
OPO
- STL
1 stop13h 55m
United Airlines
Deal found 2/9![United Airlines logo]()
$678
This Delta deal was found by Cheapflights users on 2/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/76:32 am
STL
- OPO
2 stops22h 23m
Delta
Mon 4/134:20 pm
OPO
- STL
2 stops30h 30m
Delta
Deal found 2/7![Delta logo]()
$694
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Wed 3/181:14 pm
STL
- OPO
2 stops21h 11m
United Airlines
Wed 3/256:00 am
OPO
- STL
2 stops44h 15m
United Airlines
Deal found 2/9![United Airlines logo]()
$704
This Gurufare deal was found by Cheapflights users on 2/9. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/14:05 pm
STL
- TER
2 stops26h 10m
TAP AIR PORTUGAL
Mon 4/67:05 am
TER
- STL
2 stops32h 23m
TAP AIR PORTUGAL
Deal found 2/9![TAP AIR PORTUGAL logo]()
$3,093
This Mytrip deal was found by Cheapflights users on 2/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/14:05 pm
STL
- TER
3 stops26h 10m
Multiple Airlines
Mon 4/66:15 pm
TER
- STL
2 stops48h 10m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$4,864
Last-minute flights from St. Louis to PortugalDiscover last-minute flight deals from St. Louis to Portugal. Data last updated February 11, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Portugal. Data last updated February 11, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Thu 2/1912:15 pm
STL
- LIS
1 stop16h 00m
United Airlines
Thu 2/2611:20 am
LIS
- STL
2 stops39h 45m
United Airlines
Deal found 2/9![United Airlines logo]()
$587
This Delta deal was found by Cheapflights users on 2/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/196:35 am
STL
- LIS
2 stops22h 45m
Delta
Thu 2/265:00 am
LIS
- STL
2 stops24h 36m
Delta
Deal found 2/9![Delta logo]()
$602
This Expedia deal was found by Cheapflights users on 2/9. 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.
Thu 2/192:00 pm
STL
- LIS
1 stop13h 05m
Iberia
Thu 2/2610:55 am
LIS
- STL
1 stop18h 09m
Iberia
Deal found 2/9![Iberia logo]()
$607
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Sun 2/228:17 am
STL
- LIS
2 stops19h 58m
United Airlines
Tue 3/311:20 am
LIS
- STL
2 stops39h 45m
United Airlines
Deal found 2/10![United Airlines logo]()
$541
This oojo deal was found by Cheapflights users on 2/10. 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.
Sun 2/222:00 pm
STL
- LIS
1 stop13h 05m
British Airways
Tue 3/311:05 am
LIS
- STL
1 stop17h 59m
British Airways
Deal found 2/10![British Airways logo]()
$554
This United Airlines deal was found by Cheapflights users on 2/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/411:25 am
STL
- LIS
2 stops14h 45m
United Airlines
Sun 3/85:00 am
LIS
- STL
1 stop14h 55m
United Airlines
Deal found 2/7![United Airlines logo]()
$589
This Delta deal was found by Cheapflights users on 2/8. 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 3/96:32 am
STL
- LIS
2 stops21h 28m
Delta
Tue 3/2411:25 am
LIS
- STL
2 stops17h 33m
Delta
Deal found 2/8![Delta logo]()
$553
This United Airlines deal was found by Cheapflights users on 2/8. 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 3/98:30 am
STL
- LIS
1 stop20h 45m
United Airlines
Tue 3/2412:20 pm
LIS
- STL
2 stops35h 54m
United Airlines
Deal found 2/8![United Airlines logo]()
$616
This Delta deal was found by Cheapflights users on 2/10. 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.
Tue 3/103:05 pm
STL
- LIS
2 stops21h 25m
Delta
Tue 3/175:00 am
LIS
- STL
2 stops20h 42m
Delta
Deal found 2/10![Delta logo]()
$503
This Ovago deal was found by Cheapflights users on 2/10. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/107:00 pm
STL
- LIS
2 stops23h 30m
Lufthansa
Tue 3/1710:15 am
LIS
- STL
1 stop18h 36m
Lufthansa
Deal found 2/10![Lufthansa logo]()
$566
This CheapOair deal was found by Cheapflights users on 2/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/102:00 pm
STL
- LIS
1 stop14h 05m
British Airways
Tue 3/1711:05 am
LIS
- STL
1 stop16h 57m
British Airways
Deal found 2/10![British Airways logo]()
$604
This KAYAK deal was found by Cheapflights users on 2/8. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/156:32 am
STL
- LIS
2 stops20h 28m
Scandinavian Airlines
Wed 3/2511:25 am
LIS
- STL
2 stops26h 40m
Scandinavian Airlines
Deal found 2/8![Scandinavian Airlines logo]()
$530
One-way flights from St. Louis to PortugalSearch for one-way flight options from St. Louis to Portugal. Find affordable one-way fares based on user searches. Data last updated February 11, 2026.
Search for one-way flight options from St. Louis to Portugal. Find affordable one-way fares based on user searches. Data last updated February 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Fri 3/2012:16 pm
STL
- LIS
3 stops51h 39m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$342
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Sat 3/214:21 pm
STL
- OPO
3 stops49h 29m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$371
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Thu 5/147:45 am
STL
- OPO
2 stops21h 30m
United Airlines
Deal found 2/8![United Airlines logo]()
$404
This KAYAK deal was found by Cheapflights users on 2/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/206:00 am
STL
- LIS
2 stops23h 10m
Aer Lingus
Deal found 2/10![Aer Lingus logo]()
$406
This Cheapflightsfares deal was found by Cheapflights users on 2/8. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/149:35 pm
STL
- LIS
1 stop14h 20m
British Airways
Deal found 2/8![British Airways logo]()
$409
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/143:30 pm
STL
- LIS
3 stops25h 55m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$412
This Booking.com deal was found by Cheapflights users on 2/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:00 am
STL
- LIS
2 stops21h 20m
Air Canada
Deal found 2/8![Air Canada logo]()
$422
This FlightHub deal was found by Cheapflights users on 2/8. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/11:00 pm
STL
- LIS
2 stops40h 00m
Air Canada
Deal found 2/8![Air Canada logo]()
$427
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/13:48 pm
STL
- LIS
3 stops47h 57m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$430
This Gotogate deal was found by Cheapflights users on 2/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/63:55 pm
STL
- OPO
2 stops46h 25m
British Airways
Deal found 2/10![British Airways logo]()
$438
This Expedia deal was found by Cheapflights users on 2/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/147:00 pm
STL
- OPO
2 stops39h 15m
Lufthansa
Deal found 2/10![Lufthansa logo]()
$451
This KAYAK deal was found by Cheapflights users on 2/8. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/11:00 pm
STL
- LIS
2 stops40h 00m
Lufthansa
Deal found 2/8![Lufthansa logo]()
$457
Find flight deals from St. Louis to Portugal
Keep the following information in mind while searching for St. Louis to Portugal flight deals. Data was last updated February 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $500 (United Airlines) |
One-way from | $342 (Kiwi.com) |
Popular in | December |
Cheapest in | January |
Average price | $707 |
Cheapflights Fare Finder
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 February 11, 2026.
Use the filters below to find and compare flights from St. Louis to Portugal that are best for you.
Fly from
St. Louis
Fly to
Portugal
Route
Depart
Return
Price
St. LouisLisbon
STL - LIS
STLLIS
Lambert-St Louis
Mon 4/20
9:10 am-10:30 am
2 stops19h 20m
Lisbon Humberto Delgado
Sun 5/10
7:25 am-9:08 pm
2 stops19h 43m
$500
St. LouisPorto
STL - OPO
STLOPO
Lambert-St Louis
Sat 4/11
8:02 pm-11:45 am
2 stops33h 43m
Porto
Wed 4/22
8:20 am-10:17 pm
2 stops19h 57m
$500
St. LouisLisbon
STL - LIS
STLLIS
Lambert-St Louis
Tue 4/21
8:30 am-9:20 am
2 stops18h 50m
Lisbon Humberto Delgado
Fri 5/8
1:00 pm-12:06 pm
1 stop29h 06m
$510
St. LouisLisbon
STL - LIS
STLLIS
Lambert-St Louis
Mon 4/20
7:45 am-10:30 am
2 stops20h 45m
Lisbon Humberto Delgado
Fri 5/8
1:00 pm-12:06 pm
1 stop29h 06m
$511
St. LouisLisbon
STL - LIS
STLLIS
Lambert-St Louis
Tue 4/14
12:45 pm-8:00 am
1 stop13h 15m
Lisbon Humberto Delgado
Tue 4/21
12:45 pm-8:30 am
2 stops25h 45m
$512
St. LouisLisbon
STL - LIS
STLLIS
Lambert-St Louis
Mon 4/13
5:27 pm-8:00 am
1 stop32h 33m
Lisbon Humberto Delgado
Wed 4/22
10:00 am-7:26 pm
1 stop15h 26m
$513
St. LouisLisbon
STL - LIS
STLLIS
Lambert-St Louis
Mon 4/20
10:00 am-10:30 am
2 stops18h 30m
Lisbon Humberto Delgado
Fri 5/1
1:00 pm-12:06 pm
1 stop29h 06m
$516
St. LouisLisbon
STL - LIS
STLLIS
Lambert-St Louis
Mon 4/13
5:27 pm-8:00 am
1 stop32h 33m
Lisbon Humberto Delgado
Tue 4/21
10:00 am-8:42 pm
2 stops16h 42m
$518
St. LouisLisbon
STL - LIS
STLLIS
Lambert-St Louis
Mon 4/20
12:45 pm-8:00 am
1 stop13h 15m
Lisbon Humberto Delgado
Sat 5/9
5:00 am-11:21 pm
2 stops24h 21m
$547
St. LouisLisbon
STL - LIS
STLLIS
Lambert-St Louis
Tue 4/21
6:25 am-10:45 am
2 stops22h 20m
Lisbon Humberto Delgado
Sat 5/9
5:00 am-11:59 pm
2 stops24h 59m
$552
Showing 1-10 of 42 results
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.
STL-LIS
STL-OPO
STL-TER
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 St. Louis to Portugal
STL-PT0
STL-LIS
STL-OPO
STL-TER
What is the cheapest month to book a flight from St. Louis to Portugal?
Currently, February is the cheapest month in which you can book a flight from St. Louis to Portugal (average of $469). Flying from St. Louis to Portugal in July is currently the most expensive (average of $857). 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.
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 February 11, 2026.
Read through reviews of airlines operating flights from St. Louis to Portugal, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Food
7.2
Comfort
7.9
Crew
8.5
Boarding
8.1
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Food
7.2
Comfort
7.9
Crew
8.5
Boarding
8.1
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Food
7.2
Comfort
7.9
Crew
8.5
Boarding
8.1
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Food
7.2
Comfort
7.9
Crew
8.5
Boarding
8.1
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Food
7.2
Comfort
7.9
Crew
8.5
Boarding
8.1
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Food
7.2
Comfort
7.9
Crew
8.5
Boarding
8.1
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
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.
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Alternative routes for St. Louis to Portugal
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Complete your trip
Complete your trip to Portugal by adding a car rental and/or hotel reservation to your travel itinerary.
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Find flights from St. Louis to Portugal, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Portugal flights
Browse other St. Louis and Portugal flight options. Last updated on February 11, 2026.
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St. Louis to Portugal flights
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Fly to Portugal regions
Consider these flights traveling to Portugal regions.
Top 6 airlines flying from St. Louis to Portugal
Discover the top 6 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 February 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$460 | Average$845 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$520 | Average$1,014 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$550 | Average$893 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$571 | Average$781 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$622 | Average$1,057 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$721 | Average$1,038 | FlexibilityNo cancel fee | On-time67% |