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

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American Airlines Flight 639 Route Deals From $155

The cheapest prices found with in the last 7 days for return flights were $340 and $155 for one-way flights to Tucson Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, May 26 - Mon, Jun 8
ORD
O'Hare Intl.
TUS
Tucson Intl.
$340 Roundtrip, found 6 days ago
$340
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, May 26 from O'Hare Intl. to Tucson Intl., returning Mon, Jun 8, priced at $340 found 6 days ago
Sat, May 30 - Tue, Sep 1
ORD
O'Hare Intl.
TUS
Tucson Intl.
$343 Roundtrip, found 5 days ago
$343
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sat, May 30 from O'Hare Intl. to Tucson Intl., returning Tue, Sep 1, priced at $343 found 5 days ago
Wed, May 27 - Mon, Jun 15
ORD
O'Hare Intl.
TUS
Tucson Intl.
$348 Roundtrip, found 1 day ago
$348
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, May 27 from O'Hare Intl. to Tucson Intl., returning Mon, Jun 15, priced at $348 found 1 day ago
Sat, May 30 - Tue, Sep 1
ORD
O'Hare Intl.
TUS
Tucson Intl.
$353 Roundtrip, found 5 days ago
$353
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sat, May 30 from O'Hare Intl. to Tucson Intl., returning Tue, Sep 1, priced at $353 found 5 days ago
Tue, May 26 - Sat, Jun 6
ORD
O'Hare Intl.
TUS
Tucson Intl.
$362 Roundtrip, found 6 days ago
$362
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, May 26 from O'Hare Intl. to Tucson Intl., returning Sat, Jun 6, priced at $362 found 6 days ago
Wed, May 20 - Mon, May 25
ORD
O'Hare Intl.
TUS
Tucson Intl.
$373 Roundtrip, found 5 days ago
$373
Roundtrip
found 5 days ago
Select American Airlines flight, departing Wed, May 20 from O'Hare Intl. to Tucson Intl., returning Mon, May 25, priced at $373 found 5 days ago
Sat, May 23 - Tue, May 26
ORD
O'Hare Intl.
TUS
Tucson Intl.
$382 Roundtrip, found 21 hours ago
$382
Roundtrip
found 21 hours ago
Select American Airlines flight, departing Sat, May 23 from O'Hare Intl. to Tucson Intl., returning Tue, May 26, priced at $382 found 21 hours ago
Mon, May 25 - Thu, May 28
ORD
O'Hare Intl.
TUS
Tucson Intl.
$385 Roundtrip, found 21 hours ago
$385
Roundtrip
found 21 hours ago
Select American Airlines flight, departing Mon, May 25 from O'Hare Intl. to Tucson Intl., returning Thu, May 28, priced at $385 found 21 hours ago
Sat, May 16 - Tue, May 19
ORD
O'Hare Intl.
TUS
Tucson Intl.
$388 Roundtrip, found 4 days ago
$388
Roundtrip
found 4 days ago
Select American Airlines flight, departing Sat, May 16 from O'Hare Intl. to Tucson Intl., returning Tue, May 19, priced at $388 found 4 days ago
Sat, May 23 - Tue, May 26
ORD
O'Hare Intl.
TUS
Tucson Intl.
$392 Roundtrip, found 21 hours ago
$392
Roundtrip
found 21 hours ago
Select American Airlines flight, departing Sat, May 23 from O'Hare Intl. to Tucson Intl., returning Tue, May 26, priced at $392 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.