Southwest AirlinesDepart13:40
Fri, Dec 25BWI → DTW
1h 35m · Direct
$129one way, per person
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- Cheapest fare
- $129
- Cheapest month
- December
- Direct flights
- Yes
- Flight time
- 1h 35m
Southwest Airlines · Fri, Dec 25
from $129
Southwest Airlines
630 km
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Cheapest month to fly from Washington to Detroit
Lowest one-way fare per person in each month. Choose a month to see every date.
Cheapest dates in December 2026
The lowest fares we've seen for each day, cheapest first.
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About flights from Washington to Detroit
Washington (WAS) and Detroit (DTT) are about 630 km apart. Direct flights take around 1h 35m, and recent direct fares were with Southwest Airlines. Over the next few months, one-way fares start from $129, and December 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 Washington to Detroit?
The cheapest one-way fare we've seen recently is $129 with Southwest Airlines, departing Friday, December 25, 2026. Over the coming months, the lowest fare in each month ranges from $129 to $172.
What is the cheapest month to fly from Washington to Detroit?
December 2026 currently has the lowest fares, from $129 one way.
Are there direct flights from Washington to Detroit?
Yes. Recent direct fares were with Southwest Airlines.
How long is the flight from Washington to Detroit?
A direct flight takes about 1h 35m. Washington and Detroit are around 630 km apart.
Which airlines fly from Washington to Detroit?
Recent fares on this route were with Frontier Airlines and Southwest Airlines.
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