United Flight 3439 Deals & Information (2025/2026)

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United Flight 3439 Route Deals From $84

The cheapest prices found with in the last 7 days for return flights were $133 and $84 for one-way flights to Detroit Metropolitan Wayne County for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, May 29 - Mon, Jun 2
EWR
Newark Liberty Intl. Airport
DTW
Detroit Metropolitan Wayne County
$133 Roundtrip, just found
$133
Roundtrip
just found
Select United flight, departing Thu, May 29 from Newark Liberty Intl. Airport to Detroit Metropolitan Wayne County, returning Mon, Jun 2, priced at $133 just found
Tue, Jul 8 - Tue, Jul 22
EWR
Newark Liberty Intl. Airport
DTW
Detroit Metropolitan Wayne County
$137 Roundtrip, found 2 hours ago
$137
Roundtrip
found 2 hours ago
Select United flight, departing Tue, Jul 8 from Newark Liberty Intl. Airport to Detroit Metropolitan Wayne County, returning Tue, Jul 22, priced at $137 found 2 hours ago
Thu, May 29 - Mon, Jun 2
EWR
Newark Liberty Intl. Airport
DTW
Detroit Metropolitan Wayne County
$139 Roundtrip, just found
$139
Roundtrip
just found
Select United flight, departing Thu, May 29 from Newark Liberty Intl. Airport to Detroit Metropolitan Wayne County, returning Mon, Jun 2, priced at $139 just found
Tue, Jul 8 - Tue, Jul 22
EWR
Newark Liberty Intl. Airport
DTW
Detroit Metropolitan Wayne County
$147 Roundtrip, found 2 hours ago
$147
Roundtrip
found 2 hours ago
Select United flight, departing Tue, Jul 8 from Newark Liberty Intl. Airport to Detroit Metropolitan Wayne County, returning Tue, Jul 22, priced at $147 found 2 hours ago
Thu, May 29 - Mon, Jun 2
EWR
Newark Liberty Intl. Airport
DTW
Detroit Metropolitan Wayne County
$149 Roundtrip, just found
$149
Roundtrip
just found
Select United flight, departing Thu, May 29 from Newark Liberty Intl. Airport to Detroit Metropolitan Wayne County, returning Mon, Jun 2, priced at $149 just found

Frequently asked questions

What route does flight number UA3439 take?
UA3439 takes several routes. The most popular is Newark Airport to EYW, which flies direct. This flight takes roughly 3 hours and 30 minutes. However, there may possibly be other flights with the same number that are multi-stop.
What terminal does UA3439 fly out of?
You’ll likely take off from Terminal C if you’re flying from Newark Airport. UA3439 serves several routes, but the direct flight between Newark Airport and Key West, FL Airport (EYW-Key West Intl.) is the most popular one.
What kind of plane is on flight number UA3439?
There’s a good chance you’ll be aboard an Embraer 170 if you’ve booked a seat from Liberty Intl. Airport (EWR) to Key West Intl. Airport, one of a few routes used for flight UA3439.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your UA3439 flight with Travelocity, please visit our Customer Service Portal.