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

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American Airlines Flight 639 Route Deals From $174

The cheapest prices found with in the last 7 days for return flights were $348 and $174 for one-way flights to Tucson Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Jun 1 - Tue, Jun 2
ORD
O'Hare Intl.
TUS
Tucson Intl.
$348 Roundtrip, found 6 days ago
$348
Roundtrip
found 6 days ago
Select American Airlines flight, departing Mon, Jun 1 from O'Hare Intl. to Tucson Intl., returning Tue, Jun 2, priced at $348 found 6 days ago
Tue, Sep 29 - Tue, Oct 13
ORD
O'Hare Intl.
TUS
Tucson Intl.
$366 Roundtrip, found 4 days ago
$366
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Sep 29 from O'Hare Intl. to Tucson Intl., returning Tue, Oct 13, priced at $366 found 4 days ago
Tue, Sep 29 - Tue, Oct 13
ORD
O'Hare Intl.
TUS
Tucson Intl.
$372 Roundtrip, found 4 days ago
$372
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Sep 29 from O'Hare Intl. to Tucson Intl., returning Tue, Oct 13, priced at $372 found 4 days ago
Tue, Sep 29 - Tue, Oct 13
ORD
O'Hare Intl.
TUS
Tucson Intl.
$376 Roundtrip, found 4 days ago
$376
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Sep 29 from O'Hare Intl. to Tucson Intl., returning Tue, Oct 13, priced at $376 found 4 days ago
Thu, May 21 - Tue, May 26
ORD
O'Hare Intl.
TUS
Tucson Intl.
$380 Roundtrip, found 2 days ago
$380
Roundtrip
found 2 days ago
Select American Airlines flight, departing Thu, May 21 from O'Hare Intl. to Tucson Intl., returning Tue, May 26, priced at $380 found 2 days ago
Tue, Aug 18 - Thu, Aug 20
ORD
O'Hare Intl.
TUS
Tucson Intl.
$381 Roundtrip, found 1 day ago
$381
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Aug 18 from O'Hare Intl. to Tucson Intl., returning Thu, Aug 20, priced at $381 found 1 day ago
Tue, Jun 16 - Sat, Jun 20
ORD
O'Hare Intl.
TUS
Tucson Intl.
$385 Roundtrip, found 1 day ago
$385
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Jun 16 from O'Hare Intl. to Tucson Intl., returning Sat, Jun 20, priced at $385 found 1 day ago
Thu, May 21 - Tue, May 26
ORD
O'Hare Intl.
TUS
Tucson Intl.
$390 Roundtrip, found 2 days ago
$390
Roundtrip
found 2 days ago
Select American Airlines flight, departing Thu, May 21 from O'Hare Intl. to Tucson Intl., returning Tue, May 26, priced at $390 found 2 days ago
Tue, Aug 18 - Thu, Aug 20
ORD
O'Hare Intl.
TUS
Tucson Intl.
$391 Roundtrip, found 1 day ago
$391
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Aug 18 from O'Hare Intl. to Tucson Intl., returning Thu, Aug 20, priced at $391 found 1 day ago
Thu, May 21 - Mon, May 25
ORD
O'Hare Intl.
TUS
Tucson Intl.
$394 Roundtrip, found 15 hours ago
$394
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Thu, May 21 from O'Hare Intl. to Tucson Intl., returning Mon, May 25, priced at $394 found 15 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.