United Flight 668 Deals & Information (2025/2026)

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United Flight 668 Route Deals From $103

The cheapest prices found with in the last 7 days for return flights were $209 and $103 for one-way flights to George Bush Intercontinental for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Oct 9 - Sun, Oct 12
SJU
Luis Munoz Marin Intl.
IAH
George Bush Intercontinental
$209 Roundtrip, found 1 hour ago
$209
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Oct 9 from Luis Munoz Marin Intl. to George Bush Intercontinental, returning Sun, Oct 12, priced at $209 found 1 hour ago
Wed, Sep 24 - Sun, Sep 28
SJU
Luis Munoz Marin Intl.
IAH
George Bush Intercontinental
$254 Roundtrip, found 2 hours ago
$254
Roundtrip
found 2 hours ago
Select United flight, departing Wed, Sep 24 from Luis Munoz Marin Intl. to George Bush Intercontinental, returning Sun, Sep 28, priced at $254 found 2 hours ago

Frequently asked questions

What route does flight number UA668 take?
UA668 takes around 4 hours and 41 minutes to fly direct from Isla Verde Intl. Airport to Houston, TX Airport (IAH-George Bush Intercontinental). Sure, there's magic in the destination, but the journey is always half the fun!
What terminal does UA668 fly out of?
You'll likely be departing from Terminal B if you're flying on UA668 direct from SJU to IAH.
What kind of plane is on flight number UA668?
Get set to cruise the skies aboard a Boeing 737-900 if your flight number is UA668. Nearly all flights from SJU to IAH operate using this aircraft model.
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 UA668 flight with Travelocity, please visit our Customer Service Portal.