Cheap flights from Saint Thomas, United States to Portsmouth, MA
Flights starting at $159. Choose between Allegiant Air, Spirit Airlines, or Frontier Airlines to find the best price.
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Tips to know when travelling to Portsmouth
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The most popular airlines for this route are Allegiant Air, Spirit Airlines, Frontier Airlines, JetBlue Airways, and Silver Airways. Saint Thomas and Portsmouth have 61 direct flights per week.
Check-in for a flight from Saint Thomas 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 |
Spirit Airlines | NKS | NK | 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 |
JetBlue Airways | JBU | B6 | No | Opens 24 days before flight Closes 2 hours before flight |
Silver Airways | SIL | 3M | No | Opens 24 days before flight Closes 2 hours before flight |
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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