Boston to Los Angeles in September 2026

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

Lowest this month $120

Highest this month $217

Sample fare $120

Airports BOS–LAX

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September 2026 price calendar

From $120 · up to $217

Mon

Tue

Wed

Thu

Fri

Sat

Sun

1 $217 2 $217 3 $184 4 $150 5 $154 6 $181 7 $207 8 $182 9 $182 10 $157 11 $153 12 $149 13 $142 14 $142 15 $142 16 $135 17 $150 18 $153 19 $158 20 $162 21 $141 22 $141 23 $120 24 $129 25 $129 26 $138 27 $210 28 $159

Los Angeles LAX

$120

Sep 23, 12:54pm · 14h 16m · 2 stops

BOS → LAX · Frontier Airlines

Los Angeles LAX

$135

Sep 16, 12:54pm · 14h 16m · 2 stops

BOS → LAX · Frontier Airlines

Los Angeles LAX

$138

Sep 26, 5:40am · 8h 5m · 1 stop

BOS → LAX · Southwest Airlines

This page is only September 2026 on the Boston to Los Angeles 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 Los Angeles in September 2026.