Cheap flights from Baltimore to Boston

One-way fares from $71 · BWI → BOS · prices found by travellers in the last 48 hours

Compare all dates Boston → Baltimore
Cheapest fare
$71

Southwest Airlines · Fri, Dec 11

Cheapest month
December

from $71

Direct flights
Yes

Southwest Airlines

Flight time
1h 25m

580 km

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Cheapest month to fly from Baltimore to Boston

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. November 2026 $133
  2. December 2026 Cheapest $71
  3. January 2027 $74

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Where to stay

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Things to do

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Getting around

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About flights from Baltimore to Boston

Baltimore (BWI) and Boston (BOS) are about 580 km apart. Direct flights take around 1h 25m, and recent direct fares were with Southwest Airlines. Over the next few months, one-way fares start from $71, and December 2026 is currently the cheapest month to fly.

These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.

Frequently asked questions

How much is a flight from Baltimore to Boston?

The cheapest one-way fare we've seen recently is $71 with Southwest Airlines, departing Friday, December 11, 2026. Over the coming months, the lowest fare in each month ranges from $71 to $133.

What is the cheapest month to fly from Baltimore to Boston?

December 2026 currently has the lowest fares, from $71 one way.

Are there direct flights from Baltimore to Boston?

Yes. Recent direct fares were with Southwest Airlines.

How long is the flight from Baltimore to Boston?

A direct flight takes about 1h 25m. Baltimore and Boston are around 580 km apart.

Which airlines fly from Baltimore to Boston?

Recent fares on this route were with Frontier Airlines and Southwest Airlines.

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