Delta Flight 3721 Deals & Information (2025/2026)

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Delta Flight 3721 Route Deals From $170

The cheapest prices found with in the last 7 days for return flights were $376 and $170 for one-way flights to Eugene for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Oct 3 - Sun, Oct 5
SLC
Salt Lake City Intl.
EUG
Eugene
$376 Roundtrip, found 3 days ago
$376
Roundtrip
found 3 days ago
Select Delta flight, departing Fri, Oct 3 from Salt Lake City Intl. to Eugene, returning Sun, Oct 5, priced at $376 found 3 days ago
Fri, Jul 25 - Tue, Jul 29
SLC
Salt Lake City Intl.
EUG
Eugene
$399 Roundtrip, found 1 day ago
$399
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Jul 25 from Salt Lake City Intl. to Eugene, returning Tue, Jul 29, priced at $399 found 1 day ago

Frequently asked questions

What route does flight number DL3721 take?
DL3721 takes a few routes. The most popular is Salt Lake City Intl. Airport to Idaho Falls Regional Airport (IDA), which flies direct. This flight takes about 59 minutes. That said, there may be other flights with the same number that are multi-stop.
What kind of plane is on flight number DL3721?
It's more than likely you'll be enjoying the services of the Embraer 175 if you've reserved a ticket on flight DL3721 from SLC to IDA. It's the most commonly used aircraft type on this particular route.
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 DL3721 flight with Travelocity, please visit our Customer Service Portal.