Frontier AirlinesDepart07:00
Wed, Nov 11DTW → STL
5h 32m · 1 stop
$137one way, per person
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- Cheapest fare
- $137
- Cheapest month
- November
- Direct flights
- Not recently
- Quickest trip
- 5h 29m
Frontier Airlines · Wed, Nov 11
from $137
Usually 1+ stop
730 km
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Cheapest month to fly from Detroit to St Louis
Lowest one-way fare per person in each month. Choose a month to see every date.
Cheapest dates in November 2026
The lowest fares we've seen for each day, cheapest first.
Frontier AirlinesFrontier AirlinesDepart17:49
Sun, Nov 8DTW → STL
5h 29m · 1 stop
$175one way, per person
View deal
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About flights from Detroit to St Louis
Detroit (DTT) and St Louis (STL) are about 730 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 5h 29m. Over the next few months, one-way fares start from $137, and November 2026 is currently the cheapest month to fly.
These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.
Frequently asked questions
How much is a flight from Detroit to St Louis?
The cheapest one-way fare we've seen recently is $137 with Frontier Airlines, departing Wednesday, November 11, 2026.
What is the cheapest month to fly from Detroit to St Louis?
November 2026 currently has the lowest fares, from $137 one way.
Are there direct flights from Detroit to St Louis?
We haven't seen direct fares recently, so most journeys include at least one stop.
How long is the flight from Detroit to St Louis?
The quickest journey we've seen takes about 5h 29m. Detroit and St Louis are around 730 km apart.
Which airlines fly from Detroit to St Louis?
Recent fares on this route were with Frontier Airlines.
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