American Airlines Flight AA999 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

American Airlines Flight 999 Route Deals From $127

The cheapest prices found with in the last 7 days for return flights were $139 and $127 for one-way flights to Philadelphia Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Aug 30 - Tue, Sep 2
PIT
Pittsburgh Intl.
PHL
Philadelphia Intl.
$139 Roundtrip, found 2 days ago
$139
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Aug 30 from Pittsburgh Intl. to Philadelphia Intl., returning Tue, Sep 2, priced at $139 found 2 days ago
Sat, Nov 8 - Tue, Nov 11
PIT
Pittsburgh Intl.
TTN
Mercer
$267 Roundtrip, found 1 day ago
$267
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Nov 8 from Pittsburgh Intl. to Mercer, returning Tue, Nov 11, priced at $267 found 1 day ago
Sat, Nov 8 - Tue, Nov 11
PIT
Pittsburgh Intl.
TTN
Mercer
$316 Roundtrip, found 1 day ago
$316
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Nov 8 from Pittsburgh Intl. to Mercer, returning Tue, Nov 11, priced at $316 found 1 day ago
Sat, Oct 4 - Sun, Oct 5
PIT
Pittsburgh Intl.
TTN
Mercer
$362 Roundtrip, found 2 days ago
$362
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Oct 4 from Pittsburgh Intl. to Mercer, returning Sun, Oct 5, priced at $362 found 2 days ago
Sat, Nov 8 - Tue, Nov 11
PIT
Pittsburgh Intl.
TTN
Mercer
$415 Roundtrip, found 1 day ago
$415
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Nov 8 from Pittsburgh Intl. to Mercer, returning Tue, Nov 11, priced at $415 found 1 day ago
Fri, Oct 10 - Mon, Oct 13
PIT
Pittsburgh Intl.
TTN
Mercer
$434 Roundtrip, found 6 days ago
$434
Roundtrip
found 6 days ago
Select American Airlines flight, departing Fri, Oct 10 from Pittsburgh Intl. to Mercer, returning Mon, Oct 13, priced at $434 found 6 days ago
Sat, Oct 4 - Sun, Oct 5
PIT
Pittsburgh Intl.
TTN
Mercer
$461 Roundtrip, found 2 days ago
$461
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Oct 4 from Pittsburgh Intl. to Mercer, returning Sun, Oct 5, priced at $461 found 2 days ago
Fri, Oct 10 - Mon, Oct 13
PIT
Pittsburgh Intl.
TTN
Mercer
$470 Roundtrip, found 6 days ago
$470
Roundtrip
found 6 days ago
Select American Airlines flight, departing Fri, Oct 10 from Pittsburgh Intl. to Mercer, returning Mon, Oct 13, priced at $470 found 6 days ago
Sat, Nov 8 - Tue, Nov 11
PIT
Pittsburgh Intl.
TTN
Mercer
$478 Roundtrip, found 1 day ago
$478
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Nov 8 from Pittsburgh Intl. to Mercer, returning Tue, Nov 11, priced at $478 found 1 day ago
Fri, Oct 10 - Mon, Oct 13
PIT
Pittsburgh Intl.
TTN
Mercer
$480 Roundtrip, found 6 days ago
$480
Roundtrip
found 6 days ago
Select American Airlines flight, departing Fri, Oct 10 from Pittsburgh Intl. to Mercer, returning Mon, Oct 13, priced at $480 found 6 days ago

Frequently asked questions

What route does flight number AA999 take?
AA999 flies direct between Pittsburgh Intl. Airport (PIT) and Philadelphia Airport in 1 hour and 26 minutes. It can sometimes take other routes though, some of which could be multi-stop journeys. Keep this in mind when locking in your seat to avoid any confusion.
What kind of plane is on flight number AA999?
It's possible you'll be on the Airbus A319 if you're going from Pittsburgh Airport to Philadelphia Airport, one of several routes used for flight number AA999.
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 AA999 flight with Travelocity, please visit our Customer Service Portal.