Washington to Houston in September 2026

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

Lowest this month $91

Highest this month $172

Sample fare $91

Airports IAD–IAH

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September 2026 price calendar

From $91 · up to $172

Mon

Tue

Wed

Thu

Fri

Sat

Sun

1 $170 2 $172 3 $164 4 $156 5 $123 6 $123 7 $123 8 $123 9 $123 10 $123 11 $123 12 $123 13 $123 14 $123 15 $123 16 $123 17 $123 18 $123 19 $91

Houston HOU

$91

Sep 19, 7:50am · 15h 40m · 1 stop

IAD → IAH · Frontier Airlines

This page is only September 2026 on the Washington to Houston 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 Washington to Houston in September 2026.