American Airlines Flight 4321 Deals & Information (2025/2026)

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American Airlines Flight 4321 Route Deals From $351

The cheapest prices found with in the last 7 days for return flights were $422 and $351 for one-way flights to Waterloo Regional for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Jul 30 - Tue, Aug 19
ORD
O'Hare Intl.
ALO
Waterloo Regional
$422 Roundtrip, found 2 days ago
$422
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Jul 30 from O'Hare Intl. to Waterloo Regional, returning Tue, Aug 19, priced at $422 found 2 days ago
Tue, Aug 5 - Tue, Aug 19
ORD
O'Hare Intl.
ALO
Waterloo Regional
$426 Roundtrip, found 2 days ago
$426
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Aug 5 from O'Hare Intl. to Waterloo Regional, returning Tue, Aug 19, priced at $426 found 2 days ago
Wed, Aug 6 - Sat, Aug 9
ORD
O'Hare Intl.
ALO
Waterloo Regional
$427 Roundtrip, found 7 hours ago
$427
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Wed, Aug 6 from O'Hare Intl. to Waterloo Regional, returning Sat, Aug 9, priced at $427 found 7 hours ago
Sat, Aug 2 - Tue, Aug 19
ORD
O'Hare Intl.
ALO
Waterloo Regional
$428 Roundtrip, found 2 days ago
$428
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Aug 2 from O'Hare Intl. to Waterloo Regional, returning Tue, Aug 19, priced at $428 found 2 days ago
Wed, Jul 30 - Mon, Aug 18
ORD
O'Hare Intl.
ALO
Waterloo Regional
$444 Roundtrip, found 2 days ago
$444
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Jul 30 from O'Hare Intl. to Waterloo Regional, returning Mon, Aug 18, priced at $444 found 2 days ago
Wed, Jul 30 - Sat, Aug 16
ORD
O'Hare Intl.
ALO
Waterloo Regional
$447 Roundtrip, found 2 days ago
$447
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Jul 30 from O'Hare Intl. to Waterloo Regional, returning Sat, Aug 16, priced at $447 found 2 days ago
Wed, Jul 23 - Tue, Jul 29
ORD
O'Hare Intl.
ALO
Waterloo Regional
$450 Roundtrip, found 2 days ago
$450
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Jul 23 from O'Hare Intl. to Waterloo Regional, returning Tue, Jul 29, priced at $450 found 2 days ago
Wed, Aug 6 - Sat, Aug 9
ORD
O'Hare Intl.
ALO
Waterloo Regional
$451 Roundtrip, found 7 hours ago
$451
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Wed, Aug 6 from O'Hare Intl. to Waterloo Regional, returning Sat, Aug 9, priced at $451 found 7 hours ago
Mon, Aug 4 - Tue, Aug 19
ORD
O'Hare Intl.
ALO
Waterloo Regional
$452 Roundtrip, found 2 days ago
$452
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Aug 4 from O'Hare Intl. to Waterloo Regional, returning Tue, Aug 19, priced at $452 found 2 days ago
Sat, Aug 2 - Sat, Aug 16
ORD
O'Hare Intl.
ALO
Waterloo Regional
$453 Roundtrip, found 2 days ago
$453
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Aug 2 from O'Hare Intl. to Waterloo Regional, returning Sat, Aug 16, priced at $453 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.