ORD (Chicago) to Washington in September 2026

Dated one-way fares from ORD (Chicago) to Washington in September 2026. Use the calendar to see which days are cheaper.

Lowest this month $34

Highest this month $164

Sample fare $34

Airports ORD–BWI

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September 2026 price calendar

From $34 · up to $164

Mon

Tue

Wed

Thu

Fri

Sat

Sun

1 $150 2 $146 3 $155 4 $155 5 $155 6 $155 7 $155 8 $164 9 $128 10 $128 11 $128 12 $128 13 $128 14 $128 15 $128 16 $128 17 $128 18 $128 19 $128 20 $128 21 $93 22 $63 23 $63 24 $34

Baltimore BWI

$34

Sep 24, 6:20am · 2h 5m · 0 stops

ORD → BWI · Frontier Airlines

This page is only September 2026 on the ORD (Chicago) to Washington 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 ORD (Chicago) to Washington in September 2026.