United Flight UA3719 Deals & Information (2025/2026)

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United Flight 3719 Route Deals From $100

The cheapest prices found with in the last 7 days for return flights were $187 and $100 for one-way flights to Lambert-St. Louis Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Oct 28 - Sun, Nov 2
EWR
Newark Liberty Intl. Airport
STL
Lambert-St. Louis Intl.
$187 Roundtrip, found 6 days ago
$187
Roundtrip
found 6 days ago
Select United flight, departing Tue, Oct 28 from Newark Liberty Intl. Airport to Lambert-St. Louis Intl., returning Sun, Nov 2, priced at $187 found 6 days ago
Wed, Sep 24 - Mon, Sep 29
EWR
Newark Liberty Intl. Airport
STL
Lambert-St. Louis Intl.
$197 Roundtrip, found 2 days ago
$197
Roundtrip
found 2 days ago
Select United flight, departing Wed, Sep 24 from Newark Liberty Intl. Airport to Lambert-St. Louis Intl., returning Mon, Sep 29, priced at $197 found 2 days ago
Wed, Sep 24 - Mon, Sep 29
EWR
Newark Liberty Intl. Airport
STL
Lambert-St. Louis Intl.
$207 Roundtrip, found 2 days ago
$207
Roundtrip
found 2 days ago
Select United flight, departing Wed, Sep 24 from Newark Liberty Intl. Airport to Lambert-St. Louis Intl., returning Mon, Sep 29, priced at $207 found 2 days ago
Thu, Sep 11 - Tue, Sep 16
EWR
Newark Liberty Intl. Airport
STL
Lambert-St. Louis Intl.
$209 Roundtrip, found 6 hours ago
$209
Roundtrip
found 6 hours ago
Select United flight, departing Thu, Sep 11 from Newark Liberty Intl. Airport to Lambert-St. Louis Intl., returning Tue, Sep 16, priced at $209 found 6 hours ago
Thu, Sep 11 - Tue, Sep 16
EWR
Newark Liberty Intl. Airport
STL
Lambert-St. Louis Intl.
$220 Roundtrip, found 6 hours ago
$220
Roundtrip
found 6 hours ago
Select United flight, departing Thu, Sep 11 from Newark Liberty Intl. Airport to Lambert-St. Louis Intl., returning Tue, Sep 16, priced at $220 found 6 hours ago
Tue, Sep 23 - Fri, Sep 26
EWR
Newark Liberty Intl. Airport
STL
Lambert-St. Louis Intl.
$222 Roundtrip, found 17 hours ago
$222
Roundtrip
found 17 hours ago
Select United flight, departing Tue, Sep 23 from Newark Liberty Intl. Airport to Lambert-St. Louis Intl., returning Fri, Sep 26, priced at $222 found 17 hours ago