American Airlines Flight NK621 Deals & Information (2025/2026)

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American Airlines Flight 621 Route Deals From $81

The cheapest prices found with in the last 7 days for return flights were $131 and $81 for one-way flights to Philadelphia Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Aug 4 - Sat, Aug 9
ATL
Hartsfield-Jackson Atlanta Intl.
PHL
Philadelphia Intl.
$131 Roundtrip, found 1 hour ago
$131
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Mon, Aug 4 from Hartsfield-Jackson Atlanta Intl. to Philadelphia Intl., returning Sat, Aug 9, priced at $131 found 1 hour ago
Mon, Aug 4 - Sat, Aug 9
ATL
Hartsfield-Jackson Atlanta Intl.
PHL
Philadelphia Intl.
$151 Roundtrip, found 1 hour ago
$151
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Mon, Aug 4 from Hartsfield-Jackson Atlanta Intl. to Philadelphia Intl., returning Sat, Aug 9, priced at $151 found 1 hour ago
Wed, Aug 13 - Sun, Aug 17
ATL
Hartsfield-Jackson Atlanta Intl.
PHL
Philadelphia Intl.
$156 Roundtrip, found 11 hours ago
$156
Roundtrip
found 11 hours ago
Select American Airlines flight, departing Wed, Aug 13 from Hartsfield-Jackson Atlanta Intl. to Philadelphia Intl., returning Sun, Aug 17, priced at $156 found 11 hours ago
Mon, Sep 1 - Sat, Sep 6
ATL
Hartsfield-Jackson Atlanta Intl.
PHL
Philadelphia Intl.
$159 Roundtrip, just found
$159
Roundtrip
just found
Select American Airlines flight, departing Mon, Sep 1 from Hartsfield-Jackson Atlanta Intl. to Philadelphia Intl., returning Sat, Sep 6, priced at $159 just found

Frequently asked questions

What route does flight number AA621 take?
AA621 serves multiple routes, but the most common is between Phoenix, AZ Airport (PHX-Sky Harbor Intl.) and Hartsfield–Jackson Atlanta International Airport. If on a non-stop flight, you’ll disembark the plane in about 3 hours and 50 minutes. Multi-stop flights can also operate under the same number, as can services on other routes.
What terminal does AA621 fly out of?
If you’re jetting off from Phoenix, AZ Airport (PHX-Sky Harbor Intl.), there’s an excellent chance you’ll board the aircraft from Terminal 4. The most popular route for flight number AA621 is Phoenix, AZ Airport (PHX-Sky Harbor Intl.) to Atlanta, GA Airport (ATL-Hartsfield-Jackson Atlanta Intl.), which is a nonstop flight.
What kind of plane is on flight number AA621?
It’s likely you’ll be on board the Boeing 737-800 if you’ve booked a seat from Phoenix, AZ Airport (PHX-Sky Harbor Intl.) to Hartsfield-Jackson Atlanta Intl. Airport (ATL), one route used for flight number AA621.
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 AA621 flight with Travelocity, please visit our Customer Service Portal.