American Airlines Flight 639 Deals & Information (2026/2027)

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 639 Route Deals From $179

The cheapest prices found with in the last 7 days for return flights were $347 and $179 for one-way flights to Tucson Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Sep 29 - Tue, Oct 13
ORD
O'Hare Intl.
TUS
Tucson Intl.
$347 Roundtrip, found 22 hours ago
$347
Roundtrip
found 22 hours ago
Select American Airlines flight, departing Tue, Sep 29 from O'Hare Intl. to Tucson Intl., returning Tue, Oct 13, priced at $347 found 22 hours ago
Tue, Sep 29 - Tue, Oct 13
ORD
O'Hare Intl.
TUS
Tucson Intl.
$352 Roundtrip, found 22 hours ago
$352
Roundtrip
found 22 hours ago
Select American Airlines flight, departing Tue, Sep 29 from O'Hare Intl. to Tucson Intl., returning Tue, Oct 13, priced at $352 found 22 hours ago
Tue, Aug 18 - Thu, Aug 20
ORD
O'Hare Intl.
TUS
Tucson Intl.
$371 Roundtrip, found 21 hours ago
$371
Roundtrip
found 21 hours ago
Select American Airlines flight, departing Tue, Aug 18 from O'Hare Intl. to Tucson Intl., returning Thu, Aug 20, priced at $371 found 21 hours ago
Tue, Jun 2 - Tue, Jun 9
ORD
O'Hare Intl.
TUS
Tucson Intl.
$376 Roundtrip, found 3 days ago
$376
Roundtrip
found 3 days ago
Select American Airlines flight, departing Tue, Jun 2 from O'Hare Intl. to Tucson Intl., returning Tue, Jun 9, priced at $376 found 3 days ago
Tue, Sep 29 - Tue, Oct 13
ORD
O'Hare Intl.
TUS
Tucson Intl.
$377 Roundtrip, found 22 hours ago
$377
Roundtrip
found 22 hours ago
Select American Airlines flight, departing Tue, Sep 29 from O'Hare Intl. to Tucson Intl., returning Tue, Oct 13, priced at $377 found 22 hours ago
Tue, Aug 18 - Thu, Aug 20
ORD
O'Hare Intl.
TUS
Tucson Intl.
$381 Roundtrip, found 21 hours ago
$381
Roundtrip
found 21 hours ago
Select American Airlines flight, departing Tue, Aug 18 from O'Hare Intl. to Tucson Intl., returning Thu, Aug 20, priced at $381 found 21 hours ago
Tue, Sep 29 - Tue, Oct 13
ORD
O'Hare Intl.
TUS
Tucson Intl.
$382 Roundtrip, found 22 hours ago
$382
Roundtrip
found 22 hours ago
Select American Airlines flight, departing Tue, Sep 29 from O'Hare Intl. to Tucson Intl., returning Tue, Oct 13, priced at $382 found 22 hours ago
Tue, Jun 2 - Tue, Jun 9
ORD
O'Hare Intl.
TUS
Tucson Intl.
$386 Roundtrip, found 3 days ago
$386
Roundtrip
found 3 days ago
Select American Airlines flight, departing Tue, Jun 2 from O'Hare Intl. to Tucson Intl., returning Tue, Jun 9, priced at $386 found 3 days ago
Mon, Nov 2 - Thu, Nov 5
ORD
O'Hare Intl.
TUS
Tucson Intl.
$388 Roundtrip, found 3 hours ago
$388
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Mon, Nov 2 from O'Hare Intl. to Tucson Intl., returning Thu, Nov 5, priced at $388 found 3 hours ago
Tue, Aug 18 - Thu, Aug 20
ORD
O'Hare Intl.
TUS
Tucson Intl.
$391 Roundtrip, found 21 hours ago
$391
Roundtrip
found 21 hours ago
Select American Airlines flight, departing Tue, Aug 18 from O'Hare Intl. to Tucson Intl., returning Thu, Aug 20, priced at $391 found 21 hours ago

Frequently asked questions

What route does flight number AA639 take?
AA639 takes a few routes. The most popular is between Tucson Intl. Airport and Chicago, IL Airport (ORD-O'Hare Intl.), which is a direct flight. This flight typically takes 3 hours and 39 minutes. However, you might find other flights with this number that are multi-stop.
What kind of plane is on flight number AA639?
AA639 is a flight number that serves lots of different routes. If you're booked on its most popular one, Tucson Intl. Airport (TUS) to ORD, there's a good chance you'll be hopping on board an Airbus A319.
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 AA639 flight with Travelocity, please visit our Customer Service Portal.