United Flight 2000 Deals & Information (2026/2027)

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United Flight 2000 Route Deals From $74

The cheapest prices found with in the last 7 days for return flights were $117 and $74 for one-way flights to Lambert-St. Louis Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Oct 8 - Sat, Oct 10
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$117 Roundtrip, found 3 days ago
$117
Roundtrip
found 3 days ago
Select United flight, departing Thu, Oct 8 from O'Hare Intl. to Lambert-St. Louis Intl., returning Sat, Oct 10, priced at $117 found 3 days ago
Tue, Aug 11 - Thu, Aug 13
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$132 Roundtrip, found 5 days ago
$132
Roundtrip
found 5 days ago
Select United flight, departing Tue, Aug 11 from O'Hare Intl. to Lambert-St. Louis Intl., returning Thu, Aug 13, priced at $132 found 5 days ago
Thu, Oct 8 - Sat, Oct 10
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$137 Roundtrip, found 3 days ago
$137
Roundtrip
found 3 days ago
Select United flight, departing Thu, Oct 8 from O'Hare Intl. to Lambert-St. Louis Intl., returning Sat, Oct 10, priced at $137 found 3 days ago
Tue, Aug 11 - Thu, Aug 13
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$142 Roundtrip, found 5 days ago
$142
Roundtrip
found 5 days ago
Select United flight, departing Tue, Aug 11 from O'Hare Intl. to Lambert-St. Louis Intl., returning Thu, Aug 13, priced at $142 found 5 days ago
Thu, Oct 8 - Sat, Oct 10
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$142 Roundtrip, found 3 days ago
$142
Roundtrip
found 3 days ago
Select United flight, departing Thu, Oct 8 from O'Hare Intl. to Lambert-St. Louis Intl., returning Sat, Oct 10, priced at $142 found 3 days ago
Thu, Oct 8 - Sat, Oct 10
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$152 Roundtrip, found 3 days ago
$152
Roundtrip
found 3 days ago
Select United flight, departing Thu, Oct 8 from O'Hare Intl. to Lambert-St. Louis Intl., returning Sat, Oct 10, priced at $152 found 3 days ago
Thu, Oct 8 - Sat, Oct 10
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$154 Roundtrip, found 3 days ago
$154
Roundtrip
found 3 days ago
Select United flight, departing Thu, Oct 8 from O'Hare Intl. to Lambert-St. Louis Intl., returning Sat, Oct 10, priced at $154 found 3 days ago
Tue, Aug 11 - Thu, Aug 13
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$154 Roundtrip, found 5 days ago
$154
Roundtrip
found 5 days ago
Select United flight, departing Tue, Aug 11 from O'Hare Intl. to Lambert-St. Louis Intl., returning Thu, Aug 13, priced at $154 found 5 days ago
Sat, Aug 8 - Wed, Aug 12
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$156 Roundtrip, found 1 day ago
$156
Roundtrip
found 1 day ago
Select United flight, departing Sat, Aug 8 from O'Hare Intl. to Lambert-St. Louis Intl., returning Wed, Aug 12, priced at $156 found 1 day ago
Sat, Aug 8 - Wed, Aug 12
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$163 Roundtrip, found 1 day ago
$163
Roundtrip
found 1 day ago
Select United flight, departing Sat, Aug 8 from O'Hare Intl. to Lambert-St. Louis Intl., returning Wed, Aug 12, priced at $163 found 1 day ago
Tue, Aug 11 - Thu, Aug 13
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$178 Roundtrip, found 5 days ago
$178
Roundtrip
found 5 days ago
Select United flight, departing Tue, Aug 11 from O'Hare Intl. to Lambert-St. Louis Intl., returning Thu, Aug 13, priced at $178 found 5 days ago
Sat, Aug 8 - Wed, Aug 12
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$184 Roundtrip, found 1 day ago
$184
Roundtrip
found 1 day ago
Select United flight, departing Sat, Aug 8 from O'Hare Intl. to Lambert-St. Louis Intl., returning Wed, Aug 12, priced at $184 found 1 day ago
Thu, Oct 8 - Sat, Oct 10
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$187 Roundtrip, found 3 days ago
$187
Roundtrip
found 3 days ago
Select United flight, departing Thu, Oct 8 from O'Hare Intl. to Lambert-St. Louis Intl., returning Sat, Oct 10, priced at $187 found 3 days ago
Thu, Oct 8 - Sat, Oct 10
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$207 Roundtrip, found 3 days ago
$207
Roundtrip
found 3 days ago
Select United flight, departing Thu, Oct 8 from O'Hare Intl. to Lambert-St. Louis Intl., returning Sat, Oct 10, priced at $207 found 3 days ago
Thu, Oct 8 - Sat, Oct 10
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$210 Roundtrip, found 3 days ago
$210
Roundtrip
found 3 days ago
Select United flight, departing Thu, Oct 8 from O'Hare Intl. to Lambert-St. Louis Intl., returning Sat, Oct 10, priced at $210 found 3 days ago