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

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American Airlines Flight 4321 Route Deals From $147

The cheapest prices found with in the last 7 days for return flights were $204 and $147 for one-way flights to Waterloo Regional for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Jul 16 - Tue, Jul 21
ORD
O'Hare Intl.
ALO
Waterloo Regional
$204 Roundtrip, found 3 days ago
$204
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Jul 16 from O'Hare Intl. to Waterloo Regional, returning Tue, Jul 21, priced at $204 found 3 days ago
Fri, May 15 - Sun, May 17
ORD
O'Hare Intl.
ALO
Waterloo Regional
$209 Roundtrip, found 20 hours ago
$209
Roundtrip
found 20 hours ago
Select American Airlines flight, departing Fri, May 15 from O'Hare Intl. to Waterloo Regional, returning Sun, May 17, priced at $209 found 20 hours ago
Thu, Jul 16 - Tue, Jul 21
ORD
O'Hare Intl.
ALO
Waterloo Regional
$244 Roundtrip, found 3 days ago
$244
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Jul 16 from O'Hare Intl. to Waterloo Regional, returning Tue, Jul 21, priced at $244 found 3 days ago
Fri, May 15 - Sun, May 17
ORD
O'Hare Intl.
ALO
Waterloo Regional
$250 Roundtrip, found 20 hours ago
$250
Roundtrip
found 20 hours ago
Select American Airlines flight, departing Fri, May 15 from O'Hare Intl. to Waterloo Regional, returning Sun, May 17, priced at $250 found 20 hours ago
Fri, May 15 - Sun, May 17
ORD
O'Hare Intl.
ALO
Waterloo Regional
$280 Roundtrip, found 8 hours ago
$280
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Fri, May 15 from O'Hare Intl. to Waterloo Regional, returning Sun, May 17, priced at $280 found 8 hours ago
Thu, Jul 16 - Tue, Jul 21
ORD
O'Hare Intl.
ALO
Waterloo Regional
$314 Roundtrip, found 3 days ago
$314
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Jul 16 from O'Hare Intl. to Waterloo Regional, returning Tue, Jul 21, priced at $314 found 3 days ago
Fri, May 15 - Sun, May 17
ORD
O'Hare Intl.
ALO
Waterloo Regional
$321 Roundtrip, found 20 hours ago
$321
Roundtrip
found 20 hours ago
Select American Airlines flight, departing Fri, May 15 from O'Hare Intl. to Waterloo Regional, returning Sun, May 17, priced at $321 found 20 hours ago
Thu, Jul 16 - Tue, Jul 21
ORD
O'Hare Intl.
ALO
Waterloo Regional
$328 Roundtrip, found 3 days ago
$328
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Jul 16 from O'Hare Intl. to Waterloo Regional, returning Tue, Jul 21, priced at $328 found 3 days ago
Fri, May 15 - Sun, May 17
ORD
O'Hare Intl.
ALO
Waterloo Regional
$352 Roundtrip, found 8 hours ago
$352
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Fri, May 15 from O'Hare Intl. to Waterloo Regional, returning Sun, May 17, priced at $352 found 8 hours ago
Fri, May 15 - Sun, May 17
ORD
O'Hare Intl.
ALO
Waterloo Regional
$449 Roundtrip, found 20 hours ago
$449
Roundtrip
found 20 hours ago
Select American Airlines flight, departing Fri, May 15 from O'Hare Intl. to Waterloo Regional, returning Sun, May 17, priced at $449 found 20 hours ago
Fri, May 15 - Sun, May 17
ORD
O'Hare Intl.
ALO
Waterloo Regional
$502 Roundtrip, found 8 hours ago
$502
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Fri, May 15 from O'Hare Intl. to Waterloo Regional, returning Sun, May 17, priced at $502 found 8 hours ago
Thu, Jul 16 - Tue, Jul 21
ORD
O'Hare Intl.
ALO
Waterloo Regional
$1,193 Roundtrip, found 3 days ago
$1,193
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Jul 16 from O'Hare Intl. to Waterloo Regional, returning Tue, Jul 21, priced at $1,193 found 3 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.