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 $194 and $208 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Sep 3 - Sat, Sep 19
ATW
Appleton Intl.
ORD
O'Hare Intl.
$194 Roundtrip, found 17 hours ago
$194
Roundtrip
found 17 hours ago
Select American Airlines flight, departing Thu, Sep 3 from Appleton Intl. to O'Hare Intl., returning Sat, Sep 19, priced at $194 found 17 hours ago
Sat, Feb 14 - Mon, Feb 23
ATW
Appleton Intl.
ORD
O'Hare Intl.
$199 Roundtrip, found 1 day ago
$199
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Feb 14 from Appleton Intl. to O'Hare Intl., returning Mon, Feb 23, priced at $199 found 1 day ago
Thu, Sep 3 - Sat, Sep 19
ATW
Appleton Intl.
ORD
O'Hare Intl.
$209 Roundtrip, found 17 hours ago
$209
Roundtrip
found 17 hours ago
Select American Airlines flight, departing Thu, Sep 3 from Appleton Intl. to O'Hare Intl., returning Sat, Sep 19, priced at $209 found 17 hours ago
Sat, Feb 14 - Mon, Feb 23
ATW
Appleton Intl.
ORD
O'Hare Intl.
$224 Roundtrip, found 1 day ago
$224
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Feb 14 from Appleton Intl. to O'Hare Intl., returning Mon, Feb 23, priced at $224 found 1 day ago
Wed, Jun 10 - Tue, Jun 16
ATW
Appleton Intl.
ORD
O'Hare Intl.
$239 Roundtrip, found 4 days ago
$239
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, Jun 10 from Appleton Intl. to O'Hare Intl., returning Tue, Jun 16, priced at $239 found 4 days ago
Sat, Feb 14 - Mon, Feb 23
ATW
Appleton Intl.
ORD
O'Hare Intl.
$240 Roundtrip, found 1 day ago
$240
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Feb 14 from Appleton Intl. to O'Hare Intl., returning Mon, Feb 23, priced at $240 found 1 day ago
Wed, Feb 11 - Sat, Feb 14
ATW
Appleton Intl.
ORD
O'Hare Intl.
$242 Roundtrip, found 5 days ago
$242
Roundtrip
found 5 days ago
Select American Airlines flight, departing Wed, Feb 11 from Appleton Intl. to O'Hare Intl., returning Sat, Feb 14, priced at $242 found 5 days ago
Mon, Feb 16 - Sat, Feb 21
ATW
Appleton Intl.
ORD
O'Hare Intl.
$245 Roundtrip, found 1 day ago
$245
Roundtrip
found 1 day ago
Select American Airlines flight, departing Mon, Feb 16 from Appleton Intl. to O'Hare Intl., returning Sat, Feb 21, priced at $245 found 1 day ago
Thu, Jun 11 - Tue, Jun 16
ATW
Appleton Intl.
ORD
O'Hare Intl.
$256 Roundtrip, found 4 days ago
$256
Roundtrip
found 4 days ago
Select American Airlines flight, departing Thu, Jun 11 from Appleton Intl. to O'Hare Intl., returning Tue, Jun 16, priced at $256 found 4 days ago
Thu, Feb 5 - Mon, Feb 9
ATW
Appleton Intl.
ORD
O'Hare Intl.
$258 Roundtrip, found 7 hours ago
$258
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Thu, Feb 5 from Appleton Intl. to O'Hare Intl., returning Mon, Feb 9, priced at $258 found 7 hours ago