Delta Flight 3640 Deals & Information (2025/2026)

DL3640 is used on multiple routes, but the most common is between Salt Lake City Intl. Airport (SLC) and Tucson, AZ Airport (TUS-Tucson Intl.). If you’re lucky enough to score a direct flight, you’ll step off the plane in approximately 1 hour and 57 minutes. Multi-stop flights can also operate under the same number, as can services on other routes.

If you’re taking to the skies with Delta flight number DL3640 between Salt Lake City, UT Airport (SLC-Salt Lake City Intl.) and Tucson Intl. Airport (TUS), it’s a relief knowing that their services depart as scheduled 88% of the time. On the rare occasion that a flight runs behind, it should only be delayed by around 1 hour and 7 minutes. Thanks to this airline’s quality of service, this service has a 2.15-star rating.

DL3640 is a flight number that serves several routes. If you’re traveling on the most popular route, Salt Lake City Intl. Airport to Tucson Intl. Airport (TUS), you’re likely to be on the Embraer 175.

For more info about changing your DL3640 flight with Travelocity, please visit our Customer Service Portal.