FFL Helper

FFL Helper / DTW (Detroit) / Ontario / September 2026

DTW → ONT · 2026-09

DTW (Detroit) to Ontario in September 2026

Dated one-way fares from DTW (Detroit) to Ontario in September 2026. Use the calendar to see which days are cheaper.

Lowest this month $99
Highest this month $140
Sample fare $99
Airports DTW–ONT
Search September 2026 tickets

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Other months: September 2026 · Full route

September 2026 price calendar

September 2026

From $99 · up to $140

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Dated fares

Ontario ONT

$99

Sep 26, 7:08am · 19h 39m · 1 stop

DTW → ONT · Frontier Airlines

Tickets

Ontario ONT

$140

Sep 25, 8:35pm · 16h 55m · 1 stop

DTW → ONT · Frontier Airlines

Tickets

Booking DTW to ONT in September 2026

This page is only September 2026 on the DTW (Detroit) to Ontario 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 DTW (Detroit) to Ontario in September 2026.