United Flight 3684 Deals & Information (2025/2026)

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United Flight 3684 Route Deals From $99

The cheapest prices found with in the last 7 days for return flights were $195 and $99 for one-way flights to Newark Liberty Intl. Airport for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Oct 30 - Tue, Nov 4
STL
Lambert-St. Louis Intl.
EWR
Newark Liberty Intl. Airport
$195 Roundtrip, found 2 days ago
$195
Roundtrip
found 2 days ago
Select United flight, departing Thu, Oct 30 from Lambert-St. Louis Intl. to Newark Liberty Intl. Airport, returning Tue, Nov 4, priced at $195 found 2 days ago
Thu, Oct 30 - Mon, Nov 3
STL
Lambert-St. Louis Intl.
EWR
Newark Liberty Intl. Airport
$197 Roundtrip, found 2 days ago
$197
Roundtrip
found 2 days ago
Select United flight, departing Thu, Oct 30 from Lambert-St. Louis Intl. to Newark Liberty Intl. Airport, returning Mon, Nov 3, priced at $197 found 2 days ago