Baltimore to Boston in September 2026

Dated one-way fares from Baltimore to Boston in September 2026. Use the calendar to see which days are cheaper.

Lowest this month $162

Highest this month $267

Sample fare $156

Airports BWI–BOS

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September 2026 price calendar

From $162 · up to $267

Mon

Tue

Wed

Thu

Fri

Sat

Sun

1 $267 2 $162 3 $163

Boston BOS

$162

Sep 02, 12:09pm · 21h · 1 stop

BWI → BOS · Frontier Airlines

Boston BOS

$163

Sep 03, 6:24am · 26h 45m · 1 stop

BWI → BOS · Frontier Airlines

Boston BOS

$267

Sep 01, 6:30am · 1h 30m · 0 stops

BWI → BOS · Southwest Airlines

This page is only September 2026 on the Baltimore to Boston route. Open the full route if you want the next months side by side.

Prices move as seats sell. Confirm the live itinerary before you book Baltimore to Boston in September 2026.