
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $574 (United Airlines) |
Popular in | July |
Cheapest in | November |
Average price | $612 |
Fly from
Fly to
Route
Depart
Return
Price
St. LouisPorto
STL - OPO
STLOPO
Lambert-St Louis
Tue 3/10
5:40 pm-9:30 am
1 stop10h 50m
Porto
Wed 3/18
6:00 am-2:55 pm
1 stop13h 55m
St. LouisPorto
STL - OPO
STLOPO
Lambert-St Louis
Thu 11/27
7:00 am-9:30 am
1 stop20h 30m
Porto
Wed 12/10
6:00 am-1:55 pm
1 stop13h 55m
St. LouisPorto
STL - OPO
STLOPO
Lambert-St Louis
Fri 3/27
11:25 am-9:30 am
2 stops17h 05m
Porto
Tue 3/31
6:00 am-10:59 pm
2 stops22h 59m
St. LouisPorto
STL - OPO
STLOPO
Lambert-St Louis
Fri 12/12
2:38 pm-10:30 am
2 stops13h 52m
Porto
Tue 12/16
9:55 am-8:47 pm
2 stops16h 52m
St. LouisPorto
STL - OPO
STLOPO
Lambert-St Louis
Fri 3/27
4:50 pm-2:45 pm
1 stop16h 55m
Porto
Tue 3/31
6:00 am-9:03 pm
2 stops21h 03m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars |
Unlike in the evening, when flights are generally more expensive, you can save up to 39% on flights from St. Louis to Porto by exploring options for tickets at noon.
Food
Overall
Comfort
Crew
Entertainment
Boarding
Reviews
Sebrena,Oct 2025
IAH - RSW
Food
Overall
Comfort
Crew
Entertainment
Boarding
Reviews
Sebrena,Oct 2025
IAH - RSW
Food
Overall
Comfort
Crew
Entertainment
Boarding
Reviews
Sebrena,Oct 2025
IAH - RSW
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$549 | Average$1,214 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$751 | Average$1,177 | FlexibilityNo cancel fee | On-time69% |