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 $173 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.

Mon, Sep 22 - Thu, Sep 25
EWR
Newark Liberty Intl. Airport
STL
Lambert-St. Louis Intl.
$173 Roundtrip, found 5 hours ago
$173
Roundtrip
found 5 hours ago
Select United flight, departing Mon, Sep 22 from Newark Liberty Intl. Airport to Lambert-St. Louis Intl., returning Thu, Sep 25, priced at $173 found 5 hours ago
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
Mon, Sep 22 - Thu, Sep 25
EWR
Newark Liberty Intl. Airport
STL
Lambert-St. Louis Intl.
$197 Roundtrip, found 5 hours ago
$197
Roundtrip
found 5 hours ago
Select United flight, departing Mon, Sep 22 from Newark Liberty Intl. Airport to Lambert-St. Louis Intl., returning Thu, Sep 25, priced at $197 found 5 hours ago
Wed, Sep 24 - Mon, Sep 29
EWR
Newark Liberty Intl. Airport
STL
Lambert-St. Louis Intl.
$197 Roundtrip, found 3 days ago
$197
Roundtrip
found 3 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 3 days ago
Thu, Oct 2 - Sun, Oct 5
EWR
Newark Liberty Intl. Airport
STL
Lambert-St. Louis Intl.
$202 Roundtrip, found 11 hours ago
$202
Roundtrip
found 11 hours ago
Select United flight, departing Thu, Oct 2 from Newark Liberty Intl. Airport to Lambert-St. Louis Intl., returning Sun, Oct 5, priced at $202 found 11 hours ago
Wed, Sep 24 - Mon, Sep 29
EWR
Newark Liberty Intl. Airport
STL
Lambert-St. Louis Intl.
$207 Roundtrip, found 3 days ago
$207
Roundtrip
found 3 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 3 days ago
Tue, Sep 16 - Fri, Sep 19
EWR
Newark Liberty Intl. Airport
STL
Lambert-St. Louis Intl.
$210 Roundtrip, found 16 hours ago
$210
Roundtrip
found 16 hours ago
Select United flight, departing Tue, Sep 16 from Newark Liberty Intl. Airport to Lambert-St. Louis Intl., returning Fri, Sep 19, priced at $210 found 16 hours ago