United Flight AA4183 Deals & Information (2025/2026)

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United Flight 4183 Route Deals From $49

The cheapest prices found with in the last 7 days for return flights were $97 and $49 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Sep 25 - Sat, Sep 27
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$97 Roundtrip, found 20 hours ago
$97
Roundtrip
found 20 hours ago
Select United flight, departing Thu, Sep 25 from Lambert-St. Louis Intl. to O'Hare Intl., returning Sat, Sep 27, priced at $97 found 20 hours ago
Sat, Oct 4 - Mon, Oct 6
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$99 Roundtrip, found 11 hours ago
$99
Roundtrip
found 11 hours ago
Select United flight, departing Sat, Oct 4 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Oct 6, priced at $99 found 11 hours ago
Mon, Oct 27 - Tue, Nov 4
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$115 Roundtrip, found 20 hours ago
$115
Roundtrip
found 20 hours ago
Select United flight, departing Mon, Oct 27 from Lambert-St. Louis Intl. to O'Hare Intl., returning Tue, Nov 4, priced at $115 found 20 hours ago
Mon, Oct 20 - Tue, Oct 21
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$117 Roundtrip, found 1 day ago
$117
Roundtrip
found 1 day ago
Select United flight, departing Mon, Oct 20 from Lambert-St. Louis Intl. to O'Hare Intl., returning Tue, Oct 21, priced at $117 found 1 day ago
Sat, Oct 18 - Mon, Oct 20
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$121 Roundtrip, found 20 hours ago
$121
Roundtrip
found 20 hours ago
Select United flight, departing Sat, Oct 18 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Oct 20, priced at $121 found 20 hours ago
Sat, Oct 4 - Mon, Oct 6
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$129 Roundtrip, found 11 hours ago
$129
Roundtrip
found 11 hours ago
Select United flight, departing Sat, Oct 4 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Oct 6, priced at $129 found 11 hours ago
Sat, Oct 18 - Mon, Oct 20
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$135 Roundtrip, found 20 hours ago
$135
Roundtrip
found 20 hours ago
Select United flight, departing Sat, Oct 18 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Oct 20, priced at $135 found 20 hours ago
Sat, Oct 18 - Mon, Oct 20
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$141 Roundtrip, found 20 hours ago
$141
Roundtrip
found 20 hours ago
Select United flight, departing Sat, Oct 18 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Oct 20, priced at $141 found 20 hours ago
Mon, Nov 3 - Sun, Nov 9
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$145 Roundtrip, found 5 days ago
$145
Roundtrip
found 5 days ago
Select United flight, departing Mon, Nov 3 from Lambert-St. Louis Intl. to O'Hare Intl., returning Sun, Nov 9, priced at $145 found 5 days ago
Thu, Sep 25 - Sat, Sep 27
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$147 Roundtrip, found 20 hours ago
$147
Roundtrip
found 20 hours ago
Select United flight, departing Thu, Sep 25 from Lambert-St. Louis Intl. to O'Hare Intl., returning Sat, Sep 27, priced at $147 found 20 hours ago