United Flight UA3684 Deals & Information (2025/2026)

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United Flight 3684 Route Deals From $89

The cheapest prices found with in the last 7 days for return flights were $177 and $89 for one-way flights to Newark Liberty Intl. Airport for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, May 28 - Tue, Jun 10
STL
Lambert-St. Louis Intl.
EWR
Newark Liberty Intl. Airport
$177 Roundtrip, found 4 days ago
$177
Roundtrip
found 4 days ago
Select United flight, departing Wed, May 28 from Lambert-St. Louis Intl. to Newark Liberty Intl. Airport, returning Tue, Jun 10, priced at $177 found 4 days ago
Thu, May 29 - Tue, Jun 10
STL
Lambert-St. Louis Intl.
EWR
Newark Liberty Intl. Airport
$187 Roundtrip, found 3 days ago
$187
Roundtrip
found 3 days ago
Select United flight, departing Thu, May 29 from Lambert-St. Louis Intl. to Newark Liberty Intl. Airport, returning Tue, Jun 10, priced at $187 found 3 days ago
Tue, Jun 3 - Tue, Jun 17
STL
Lambert-St. Louis Intl.
EWR
Newark Liberty Intl. Airport
$190 Roundtrip, found 4 days ago
$190
Roundtrip
found 4 days ago
Select United flight, departing Tue, Jun 3 from Lambert-St. Louis Intl. to Newark Liberty Intl. Airport, returning Tue, Jun 17, priced at $190 found 4 days ago
Tue, Jun 3 - Tue, Jun 17
STL
Lambert-St. Louis Intl.
EWR
Newark Liberty Intl. Airport
$199 Roundtrip, found 4 days ago
$199
Roundtrip
found 4 days ago
Select United flight, departing Tue, Jun 3 from Lambert-St. Louis Intl. to Newark Liberty Intl. Airport, returning Tue, Jun 17, priced at $199 found 4 days ago
Thu, May 29 - Tue, Jun 10
STL
Lambert-St. Louis Intl.
EWR
Newark Liberty Intl. Airport
$202 Roundtrip, found 3 days ago
$202
Roundtrip
found 3 days ago
Select United flight, departing Thu, May 29 from Lambert-St. Louis Intl. to Newark Liberty Intl. Airport, returning Tue, Jun 10, priced at $202 found 3 days ago
Thu, Apr 10 - Wed, Apr 16
STL
Lambert-St. Louis Intl.
EWR
Newark Liberty Intl. Airport
$203 Roundtrip, found 6 days ago
$203
Roundtrip
found 6 days ago
Select United flight, departing Thu, Apr 10 from Lambert-St. Louis Intl. to Newark Liberty Intl. Airport, returning Wed, Apr 16, priced at $203 found 6 days ago
Wed, Mar 26 - Wed, Apr 2
STL
Lambert-St. Louis Intl.
EWR
Newark Liberty Intl. Airport
$207 Roundtrip, found 3 days ago
$207
Roundtrip
found 3 days ago
Select United flight, departing Wed, Mar 26 from Lambert-St. Louis Intl. to Newark Liberty Intl. Airport, returning Wed, Apr 2, priced at $207 found 3 days ago
Wed, Jun 4 - Wed, Jun 18
STL
Lambert-St. Louis Intl.
EWR
Newark Liberty Intl. Airport
$209 Roundtrip, found 4 days ago
$209
Roundtrip
found 4 days ago
Select United flight, departing Wed, Jun 4 from Lambert-St. Louis Intl. to Newark Liberty Intl. Airport, returning Wed, Jun 18, priced at $209 found 4 days ago
Mon, May 5 - Wed, May 7
STL
Lambert-St. Louis Intl.
EWR
Newark Liberty Intl. Airport
$212 Roundtrip, found 5 days ago
$212
Roundtrip
found 5 days ago
Select United flight, departing Mon, May 5 from Lambert-St. Louis Intl. to Newark Liberty Intl. Airport, returning Wed, May 7, priced at $212 found 5 days ago
Thu, May 29 - Tue, Jun 10
STL
Lambert-St. Louis Intl.
EWR
Newark Liberty Intl. Airport
$215 Roundtrip, found 3 days ago
$215
Roundtrip
found 3 days ago
Select United flight, departing Thu, May 29 from Lambert-St. Louis Intl. to Newark Liberty Intl. Airport, returning Tue, Jun 10, priced at $215 found 3 days ago