Delta Flight NK551 Deals & Information (2025/2026)

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Delta Flight 551 Route Deals From $161

The cheapest prices found with in the last 7 days for return flights were $160 and $161 for one-way flights to LaGuardia for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Nov 11 - Thu, Nov 13
DFW
Dallas-Fort Worth Intl.
LGA
LaGuardia
$160 Roundtrip, found 8 hours ago
$160
Roundtrip
found 8 hours ago
Select Delta flight, departing Tue, Nov 11 from Dallas-Fort Worth Intl. to LaGuardia, returning Thu, Nov 13, priced at $160 found 8 hours ago
Tue, Oct 14 - Tue, Oct 28
DFW
Dallas-Fort Worth Intl.
LGA
LaGuardia
$179 Roundtrip, found 2 days ago
$179
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Oct 14 from Dallas-Fort Worth Intl. to LaGuardia, returning Tue, Oct 28, priced at $179 found 2 days ago
Tue, Nov 11 - Thu, Nov 13
DAL
Love Field
LGA
LaGuardia
$385 Roundtrip, found 8 hours ago
$385
Roundtrip
found 8 hours ago
Select Delta flight, departing Tue, Nov 11 from Love Field to LaGuardia, returning Thu, Nov 13, priced at $385 found 8 hours ago

Frequently asked questions

What route does flight number DL551 take?
Flight number DL551 takes roughly 2 hours and 56 minutes to fly non-stop from Seattle - Tacoma Intl. Airport (SEA) to Sky Harbor Intl. Airport (PHX). We all know there's magic in the destination, but half the fun is in the journey!
What kind of plane is on flight number DL551?
You'll likely be jumping on board a Boeing 737-800 if you're on flight DL551. Generally, this flight heads off from SEA and lands at Phoenix, AZ Airport (PHX-Sky Harbor Intl.).
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 DL551 flight with Travelocity, please visit our Customer Service Portal.