Cheap flights from St. Louis, MO to Portsmouth, MA
Flights starting at £179. Choose between Allegiant Air, Frontier Airlines, or Spirit Airlines to find the best price.
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The most popular airlines for this route are Allegiant Air, Frontier Airlines, Spirit Airlines, Southern Airways Express, and Sun Country Airlines. St. Louis and Portsmouth have 34 direct flights per week.
Check-in for a flight from St. Louis to Portsmouth
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
---|---|---|---|---|
Allegiant Air | AAY | G4 | No | Opens 24 days before flight Closes 1 hours before flight |
Frontier Airlines | FFT | F9 | No | Opens 24 days before flight Closes 1 hours before flight |
Spirit Airlines | NKS | NK | No | Opens 24 days before flight Closes 1 hours before flight |
Southern Airways Express | FDY | 9X | Yes | No |
Sun Country Airlines | SCX | SY | Yes | No |
Weather in Portsmouth
Average Weather
Month | Average monthly max temperature | Average monthly min temperature |
January | 0°C | -6°C |
February | 1°C | -5°C |
March | 5°C | -1°C |
April | 11°C | 3°C |
May | 17°C | 8°C |
June | 21°C | 13°C |
July | 25°C | 17°C |
August | 25°C | 17°C |
September | 21°C | 13°C |
October | 15°C | 8°C |
November | 9°C | 2°C |
December | 3°C | -1°C |
14 day forecast
Frequently asked questions
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