American Airlines Flight 3637 Deals & Information (2026/2027)

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American Airlines Flight 3637 Route Deals From $208

The cheapest prices found with in the last 7 days for return flights were $184 and $208 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Feb 27 - Wed, Apr 1
ATW
Appleton Intl.
ORD
O'Hare Intl.
$184 Roundtrip, found 1 day ago
$184
Roundtrip
found 1 day ago
Select American Airlines flight, departing Fri, Feb 27 from Appleton Intl. to O'Hare Intl., returning Wed, Apr 1, priced at $184 found 1 day ago
Sat, Feb 14 - Fri, Feb 20
ATW
Appleton Intl.
ORD
O'Hare Intl.
$204 Roundtrip, found 5 days ago
$204
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sat, Feb 14 from Appleton Intl. to O'Hare Intl., returning Fri, Feb 20, priced at $204 found 5 days ago
Thu, Feb 26 - Tue, Mar 31
ATW
Appleton Intl.
ORD
O'Hare Intl.
$213 Roundtrip, found 1 day ago
$213
Roundtrip
found 1 day ago
Select American Airlines flight, departing Thu, Feb 26 from Appleton Intl. to O'Hare Intl., returning Tue, Mar 31, priced at $213 found 1 day ago
Sun, May 10 - Mon, May 18
ATW
Appleton Intl.
ORD
O'Hare Intl.
$233 Roundtrip, found 22 hours ago
$233
Roundtrip
found 22 hours ago
Select American Airlines flight, departing Sun, May 10 from Appleton Intl. to O'Hare Intl., returning Mon, May 18, priced at $233 found 22 hours ago
Sat, Mar 28 - Tue, Apr 7
ATW
Appleton Intl.
ORD
O'Hare Intl.
$239 Roundtrip, found 1 day ago
$239
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Mar 28 from Appleton Intl. to O'Hare Intl., returning Tue, Apr 7, priced at $239 found 1 day ago
Thu, May 7 - Sat, May 16
ATW
Appleton Intl.
ORD
O'Hare Intl.
$240 Roundtrip, found 2 days ago
$240
Roundtrip
found 2 days ago
Select American Airlines flight, departing Thu, May 7 from Appleton Intl. to O'Hare Intl., returning Sat, May 16, priced at $240 found 2 days ago
Sat, Feb 14 - Fri, Feb 20
ATW
Appleton Intl.
ORD
O'Hare Intl.
$245 Roundtrip, found 5 days ago
$245
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sat, Feb 14 from Appleton Intl. to O'Hare Intl., returning Fri, Feb 20, priced at $245 found 5 days ago
Wed, May 13 - Sat, May 16
ATW
Appleton Intl.
ORD
O'Hare Intl.
$246 Roundtrip, found 2 days ago
$246
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, May 13 from Appleton Intl. to O'Hare Intl., returning Sat, May 16, priced at $246 found 2 days ago
Sun, May 10 - Mon, May 18
ATW
Appleton Intl.
ORD
O'Hare Intl.
$248 Roundtrip, found 22 hours ago
$248
Roundtrip
found 22 hours ago
Select American Airlines flight, departing Sun, May 10 from Appleton Intl. to O'Hare Intl., returning Mon, May 18, priced at $248 found 22 hours ago
Sat, Mar 28 - Fri, Apr 10
ATW
Appleton Intl.
ORD
O'Hare Intl.
$254 Roundtrip, found 1 day ago
$254
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Mar 28 from Appleton Intl. to O'Hare Intl., returning Fri, Apr 10, priced at $254 found 1 day ago