FFL Helper
Baltimore BWI
$74
BOS → BWI · Southwest Airlines
FFL Helper / Boston / Baltimore / September 2026
BOS → BWI · 2026-09
Boston to Baltimore in September 2026
Dated one-way fares from Boston to Baltimore in September 2026. Use the calendar to see which days are cheaper.
Lowest this month
$74
Highest this month
$74
Sample fare
$74
Airports
BOS–BWI
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Other months: August 2026 · September 2026 · Full route
September 2026 price calendar
September 2026
From $74
Mon
Tue
Wed
Thu
Fri
Sat
Sun
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2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
$74
26
27
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30
Dated fares
Booking BOS to BWI in September 2026
This page is only September 2026 on the Boston to Baltimore 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 Boston to Baltimore in September 2026.