United Flight 1639 Deals & Information (2025/2026)

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United Flight 1639 Route Deals From $90

The cheapest prices found with in the last 7 days for return flights were $177 and $90 for one-way flights to LaGuardia for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Sep 9 - Tue, Sep 23
IAH
George Bush Intercontinental
LGA
LaGuardia
$177 Roundtrip, found 14 hours ago
$177
Roundtrip
found 14 hours ago
Select United flight, departing Tue, Sep 9 from George Bush Intercontinental to LaGuardia, returning Tue, Sep 23, priced at $177 found 14 hours ago

Frequently asked questions

What route does flight number UA1639 take?
UA1639 jets from Kahului, HI Airport (OGG) to San Francisco Intl. Airport (SFO) and is a direct flight. This service typically takes 4 hours and 56 minutes.
What kind of plane is on flight number UA1639?
The Boeing 757-200 is the type of plane that's mostly used for flight number UA1639. This flight nearly always departs from Kahului Airport (OGG) and lands at San Francisco Airport.
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 UA1639 flight with Travelocity, please visit our Customer Service Portal.