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Ontario to Detroit Flights — Fares from $155.00 | ONT–DTW

Compare the cheapest Ontario (ONT) to Detroit (DTW) fares found by our live flight search, then book online or over the phone with our travel experts.

📞 Call 1-856-513-6369
Adults
12+
1
Children
2–11
0
Infants
Under 2
0
Cabin
🏷️
Save up to 40% with unpublished phone fares
Consolidator deals on selected Ontario → Detroit flights that do not appear in online search results. The live fares below are bookable right now — or call to check for an unpublished fare on your dates.
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One-way fares Ontario → Detroit

showing indicative fares · loading live prices…
Frontier
Frontier CHEAPEST
ONT → DTW · Economy
lowest fare seen on this route
$259.99
$155.99
Select
United Airlines
United Airlines
ONT → DTW · Economy
lowest fare seen on this route
$531.89
$319.13
Select
American Airlines
American Airlines
ONT → DTW · Economy
lowest fare seen on this route
$531.89
$319.13
Select
Delta Air Lines
Delta Air Lines
ONT → DTW · Economy
lowest fare seen on this route
$534.44
$320.66
Select
Alaska Airlines
Alaska Airlines
ONT → DTW · Economy
lowest fare seen on this route
$536.20
$321.72
Select
Southwest
Southwest
ONT → DTW · Economy
lowest fare seen on this route
$556.54
$333.92
Select
See all flights & times → Prices per adult, one way, incl. taxes & fees. Availability changes constantly.
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Live fares we can book on ONT–DTW

Lowest fare found per airline on the ONT → DTW route, with our discounted phone-deal price.

AirlineCabin Found fareOur discounted fare Fare found on
Frontier Frontier Economy $259.99 $155.99 Oct 12, 2026 Book
United Airlines United Airlines Economy $531.89 $319.13 Oct 12, 2026 Book
American Airlines American Airlines Economy $531.89 $319.13 Oct 12, 2026 Book
Delta Air Lines Delta Air Lines Economy $534.44 $320.66 Oct 12, 2026 Book
Alaska Airlines Alaska Airlines Economy $536.20 $321.72 Oct 12, 2026 Book
Southwest Southwest Economy $556.54 $333.92 Oct 12, 2026 Book

Discounted fares are negotiated phone deals from our vendor network and may not appear in online search results — call 1-856-513-6369 to lock one in. Fares were found on the dates shown, are per person in USD, and change with availability.

Detroit
Detroit, United States
Hotels in Detroit
Where to stay in Detroit

More routes we cover

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Page updated October 14, 2026 · fare data refreshed automatically from live flight searches.