Delta Flight 451 Deals & Information (2025/2026)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

Delta Flight 451 Route Deals From $177

The cheapest prices found with in the last 7 days for return flights were $303 and $177 for one-way flights to John F. Kennedy Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Jun 6 - Mon, Jun 9
PDX
Portland Intl.
JFK
John F. Kennedy Intl.
$303 Roundtrip, found 4 hours ago
$303
Roundtrip
found 4 hours ago
Select Delta flight, departing Fri, Jun 6 from Portland Intl. to John F. Kennedy Intl., returning Mon, Jun 9, priced at $303 found 4 hours ago

Frequently asked questions

What route does flight number DL451 take?
Flight number DL451 takes roughly 3 hours and 16 minutes to fly directly from Hartsfield–Jackson Atlanta International Airport to Denver, CO Airport (DEN-Denver Intl.). Sure, there’s magic in the destination, but half the fun is in the journey!
How often is DL451 on time?
If you’re flying with Delta flight number DL451 from Hartsfield–Jackson Atlanta International Airport to Denver Intl. Airport (DEN), 100% of these journeys leave on schedule. If you happen to be delayed, your likely wait is about 4 minutes on average. Thanks to this air carrier’s high standards, this flight has earned a star rating of 3.8.
What terminal does DL451 fly out of?
Passengers booked on flight number DL451 from Hartsfield–Jackson Atlanta International Airport to Denver Intl. Airport (DEN) usually depart from Terminal S.
What kind of plane is on flight number DL451?
The route for flight number DL451 is predominantly ATL to DEN, and the Airbus A321 is the type of plane you’re likely to be heading off on.
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 DL451 flight with Travelocity, please visit our Customer Service Portal.