American Airlines Flight AA639 Deals & Information (2025/2026)

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American Airlines Flight 639 Route Deals From $170

The cheapest prices found with in the last 7 days for return flights were $289 and $170 for one-way flights to Tucson Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, May 21 - Sun, May 25
ORD
O'Hare Intl.
TUS
Tucson Intl.
$289 Roundtrip, found 2 hours ago
$289
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Wed, May 21 from O'Hare Intl. to Tucson Intl., returning Sun, May 25, priced at $289 found 2 hours ago
Wed, May 21 - Sun, May 25
ORD
O'Hare Intl.
TUS
Tucson Intl.
$320 Roundtrip, found 2 hours ago
$320
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Wed, May 21 from O'Hare Intl. to Tucson Intl., returning Sun, May 25, priced at $320 found 2 hours ago
Wed, May 21 - Sun, May 25
ORD
O'Hare Intl.
TUS
Tucson Intl.
$330 Roundtrip, found 2 hours ago
$330
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Wed, May 21 from O'Hare Intl. to Tucson Intl., returning Sun, May 25, priced at $330 found 2 hours ago
Sat, Aug 30 - Sun, Sep 7
ORD
O'Hare Intl.
TUS
Tucson Intl.
$339 Roundtrip, found 4 days ago
$339
Roundtrip
found 4 days ago
Select American Airlines flight, departing Sat, Aug 30 from O'Hare Intl. to Tucson Intl., returning Sun, Sep 7, priced at $339 found 4 days ago
Wed, May 21 - Sun, May 25
ORD
O'Hare Intl.
TUS
Tucson Intl.
$340 Roundtrip, found 2 hours ago
$340
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Wed, May 21 from O'Hare Intl. to Tucson Intl., returning Sun, May 25, priced at $340 found 2 hours ago
Sat, Aug 30 - Sun, Sep 7
ORD
O'Hare Intl.
TUS
Tucson Intl.
$345 Roundtrip, found 4 days ago
$345
Roundtrip
found 4 days ago
Select American Airlines flight, departing Sat, Aug 30 from O'Hare Intl. to Tucson Intl., returning Sun, Sep 7, priced at $345 found 4 days ago
Wed, May 21 - Sun, May 25
ORD
O'Hare Intl.
TUS
Tucson Intl.
$345 Roundtrip, found 2 hours ago
$345
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Wed, May 21 from O'Hare Intl. to Tucson Intl., returning Sun, May 25, priced at $345 found 2 hours ago
Wed, May 21 - Sun, May 25
ORD
O'Hare Intl.
TUS
Tucson Intl.
$346 Roundtrip, found 2 hours ago
$346
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Wed, May 21 from O'Hare Intl. to Tucson Intl., returning Sun, May 25, priced at $346 found 2 hours ago
Sat, Aug 30 - Sun, Sep 7
ORD
O'Hare Intl.
TUS
Tucson Intl.
$349 Roundtrip, found 4 days ago
$349
Roundtrip
found 4 days ago
Select American Airlines flight, departing Sat, Aug 30 from O'Hare Intl. to Tucson Intl., returning Sun, Sep 7, priced at $349 found 4 days ago
Wed, May 21 - Sun, May 25
ORD
O'Hare Intl.
TUS
Tucson Intl.
$350 Roundtrip, found 2 hours ago
$350
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Wed, May 21 from O'Hare Intl. to Tucson Intl., returning Sun, May 25, priced at $350 found 2 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.