Flights from Portland, ME to Saint Louis from $ 427*
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1 Passenger, Economy
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Featured daily fares for flights from Portland, ME (PWM) to Saint Louis (STL)
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More United deals on Portland, ME (PWM) to Saint Louis (STL) flights
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From | To | Fare Type | Dates | Price |
|---|---|---|---|---|
| Portland, ME (PWM) | Saint Louis (STL) | Roundtrip | Economy | 06/06/26 - 06/08/26 | from $Â 427 Viewed: 3 hours ago |
| Portland, ME (PWM) | Saint Louis (STL) | Roundtrip | Economy | 04/09/26 - 04/13/26 | from $Â 477 Viewed: 7 hours ago |
| Portland, ME (PWM) | Saint Louis (STL) | Roundtrip | Economy | 06/06/26 - 06/08/26 | from $Â 651 Viewed: 3 hours ago |
| Portland, ME (PWM) | Saint Louis (STL) | Roundtrip | Economy | 04/09/26 - 04/13/26 | from $Â 655 Viewed: 7 hours ago |
| Portland, ME (PWM) | Saint Louis (STL) | Roundtrip | Economy | 06/06/26 - 06/08/26 | from $Â 783 Viewed: 3 hours ago |
| Portland, ME (PWM) | Saint Louis (STL) | Roundtrip | Economy | 03/29/26 - 04/04/26 | from $Â 817 Viewed: 11 minutes ago |
| Portland, ME (PWM) | Saint Louis (STL) | Roundtrip | Economy | 04/20/26 - 04/26/26 | from $Â 829 Viewed: 2 hours ago |
| Portland, ME (PWM) | Saint Louis (STL) | Roundtrip | Economy | 04/09/26 - 04/13/26 | from $Â 838 Viewed: 7 hours ago |
*Prices have been available for round trips within the last 48 hours and may not be currently available. For Economy class, fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply. Schedules are subject to change without notice.
