Delta Flight 1221 Deals & Information (2025/2026)

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Delta Flight 1221 Route Deals From $223

The cheapest prices found with in the last 7 days for return flights were $399 and $223 for one-way flights to Hartsfield-Jackson Atlanta Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Sep 18 - Sun, Sep 21
MKE
General Mitchell Intl.
ATL
Hartsfield-Jackson Atlanta Intl.
$399 Roundtrip, found 3 days ago
$399
Roundtrip
found 3 days ago
Select Delta flight, departing Thu, Sep 18 from General Mitchell Intl. to Hartsfield-Jackson Atlanta Intl., returning Sun, Sep 21, priced at $399 found 3 days ago

Frequently asked questions

What route does flight number DL1221 take?
Flight number DL1221 takes around 2 hours and 58 minutes to fly straight from Denver Intl. Airport (DEN) to Hartsfield–Jackson Atlanta International Airport. Sure, there’s magic in the destination, but getting there is half the fun!
How often is DL1221 on time?
About 85% of DL1221 flights arrive according to scheduled times — so if you’re jetsetting between DIA airport and Hartsfield–Jackson Atlanta International Airport, you can rest easy knowing that you will touch down at your destination as quickly as possible. In the rare instance that this Delta plane is late, the average wait time is roughly 16 minutes. Because of the airline’s high standard of service, this route has a 3.6-star rating.
What kind of plane is on flight number DL1221?
The Boeing 767-400 is the aircraft predominantly used for flight number DL1221. This flight almost always departs from DEN and arrives at Hartsfield–Jackson Atlanta International Airport.
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 DL1221 flight with Travelocity, please visit our Customer Service Portal.