Cheap flights from St. Louis to Boston from £123
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How much do flights to Boston cost?
Cheapest one-way trip | £137 |
|---|---|
Cheapest round-trip | £123 |
Average round-trip | £196 |
Includes rare itinerary | |
Most popular airline | Frontier Airlines |
Getting from Boston's airport to the city center
Fastest options: Blue Line subway or taxi. Best value: MBTA Blue Line and Silver Line bus.
Transport Option | Typical Time | Typical Cost | Frequency | Best For |
|---|---|---|---|---|
10-15 min | $2.40 (CharlieCard fare) | every 5–10 min (traffic dependent) | budget travelers | |
15-25 min | $0 (free from airport to South Station) | every 8–15 min (traffic dependent) | free ride to South Station | |
7-15 min | $15-$22 (varies by operator and destination) | on-demand during operating hours (traffic dependent) | scenic harbor crossing | |
15-35 min | $25-$45 (metered; includes tunnel tolls and airport fee) | on-demand 24/7 (traffic dependent) | door-to-door convenience | |
15-35 min | $20-$50 (surge pricing may apply) | on-demand 24/7 (traffic dependent) | app-based booking | |
15-35 min | $50-$100 (pre-booked; varies by provider) | by reservation (traffic dependent) | groups or business travelers | |
15-40 min | $40-$100 (daily rate; parking extra in downtown) | on-demand (traffic dependent) | exploring beyond Boston |
Notes:
- Prices in USD; table created in 2025 and subject to change.
- The Silver Line SL1 is free when traveling from the airport to South Station; fare applies in the opposite direction.
- Free shuttle buses connect all airport terminals to the Blue Line Airport station and the rental car center.
- Taxi fares include a $2.75 airport fee and tunnel tolls; traffic can significantly affect journey times.
- We recommend checking official transport websites for your travel planning.
Updated: December 2025
Key info about flying to Boston
Check-in for a flight from St. Louis to Boston
| Name | Carrier code | IATA Code | Passport needed during booking |
|---|---|---|---|
| Frontier Airlines | FFT | F9 | No |
| United Airlines | UAL | UA | No |
| JetBlue Airways | JBU | B6 | No |
| Spirit Airlines | NKS | NK | No |
| WestJet | WJA | WS | No |
Online check-in is not available for these airlines.
Weather in Boston
Average Weather
| Month | Average monthly max temperature | Average monthly min temperature |
| January | 1°C | -4°C |
| February | 3°C | -3°C |
| March | 7°C | 0°C |
| April | 13°C | 5°C |
| May | 18°C | 10°C |
| June | 23°C | 15°C |
| July | 27°C | 19°C |
| August | 27°C | 18°C |
| September | 22°C | 14°C |
| October | 16°C | 9°C |
| November | 10°C | 3°C |
| December | 5°C | 0°C |
14 day forecast
Frequently asked questions
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