American Airlines Flight 4321 Deals & Information (2026/2027)

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American Airlines Flight 4321 Route Deals From $149

The cheapest prices found with in the last 7 days for return flights were $311 and $149 for one-way flights to Waterloo Regional for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Apr 24 - Sat, Apr 25
ORD
O'Hare Intl.
ALO
Waterloo Regional
$311 Roundtrip, found 2 days ago
$311
Roundtrip
found 2 days ago
Select American Airlines flight, departing Fri, Apr 24 from O'Hare Intl. to Waterloo Regional, returning Sat, Apr 25, priced at $311 found 2 days ago
Fri, Apr 24 - Sat, Apr 25
ORD
O'Hare Intl.
ALO
Waterloo Regional
$383 Roundtrip, found 2 days ago
$383
Roundtrip
found 2 days ago
Select American Airlines flight, departing Fri, Apr 24 from O'Hare Intl. to Waterloo Regional, returning Sat, Apr 25, priced at $383 found 2 days ago
Fri, Apr 24 - Sat, Apr 25
ORD
O'Hare Intl.
ALO
Waterloo Regional
$554 Roundtrip, found 2 days ago
$554
Roundtrip
found 2 days ago
Select American Airlines flight, departing Fri, Apr 24 from O'Hare Intl. to Waterloo Regional, returning Sat, Apr 25, priced at $554 found 2 days ago
Fri, Apr 24 - Sat, Apr 25
ORD
O'Hare Intl.
ALO
Waterloo Regional
$1,221 Roundtrip, found 2 days ago
$1,221
Roundtrip
found 2 days ago
Select American Airlines flight, departing Fri, Apr 24 from O'Hare Intl. to Waterloo Regional, returning Sat, Apr 25, priced at $1,221 found 2 days ago

Frequently asked questions

What route does flight number AA4321 take?
You'll be arriving into Bishop Intl. Airport (FNT) from ORD if you're traveling on flight number AA4321. You'll be in the sky for 1 hour and 8 minutes during this journey. It's also worthwhile noting that the service conveniently travels direct.
What terminal does AA4321 fly out of?
You'll likely be hopping on the plane at Terminal 3 if you're booked on AA4321 direct from O'Hare Intl. Airport (ORD) to Bishop Intl. Airport.
What kind of plane is on flight number AA4321?
There's a good chance you'll be cruising aboard the Embraer RJ145 if you're booked on flight number AA4321. This flight almost always sets off from O'Hare Airport and comes in to land at Bishop Intl. 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 AA4321 flight with Travelocity, please visit our Customer Service Portal.