Delta Flight 3639 Deals & Information (2025/2026)

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Delta Flight 3639 Route Deals From $167

The cheapest prices found with in the last 7 days for return flights were $283 and $167 for one-way flights to Salt Lake City Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

What route does flight number DL3639 take?
Flight number DL3639 flies directly from Washington, DC Airport (IAD-Washington Dulles Intl.) to Detroit Metropolitan Wayne County Airport (DTW). During this trip, you’ll be in the air for 1 hour and 50 minutes. Book ahead to secure your favorite seat.
What kind of plane is on flight number DL3639?
There’s a strong chance you’ll find yourself on a Bombardier CRJ900 if you’re booked on flight number DL3639. Generally, this flight takes off from Washington Dulles Intl. Airport (IAD) and lands at Detroit, MI Airport (DTW-Detroit Metropolitan Wayne County).
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your DL3639 flight with Travelocity, please visit our Customer Service Portal.