United Flight UA636 Deals & Information (2025/2026)

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United Flight 636 Route Deals From $70

The cheapest prices found with in the last 7 days for return flights were $138 and $70 for one-way flights to George Bush Intercontinental for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Aug 30 - Sun, Sep 7
PHX
Sky Harbor Intl.
IAH
George Bush Intercontinental
$138 Roundtrip, found 4 hours ago
$138
Roundtrip
found 4 hours ago
Select United flight, departing Sat, Aug 30 from Sky Harbor Intl. to George Bush Intercontinental, returning Sun, Sep 7, priced at $138 found 4 hours ago
Thu, Aug 21 - Mon, Aug 25
PHX
Sky Harbor Intl.
IAH
George Bush Intercontinental
$141 Roundtrip, just found
$141
Roundtrip
just found
Select United flight, departing Thu, Aug 21 from Sky Harbor Intl. to George Bush Intercontinental, returning Mon, Aug 25, priced at $141 just found
Sat, Aug 30 - Sun, Sep 7
PHX
Sky Harbor Intl.
IAH
George Bush Intercontinental
$148 Roundtrip, found 4 hours ago
$148
Roundtrip
found 4 hours ago
Select United flight, departing Sat, Aug 30 from Sky Harbor Intl. to George Bush Intercontinental, returning Sun, Sep 7, priced at $148 found 4 hours ago
Mon, Nov 3 - Tue, Nov 4
PHX
Sky Harbor Intl.
IAH
George Bush Intercontinental
$151 Roundtrip, found 2 days ago
$151
Roundtrip
found 2 days ago
Select United flight, departing Mon, Nov 3 from Sky Harbor Intl. to George Bush Intercontinental, returning Tue, Nov 4, priced at $151 found 2 days ago
Mon, Sep 15 - Tue, Sep 16
PHX
Sky Harbor Intl.
IAH
George Bush Intercontinental
$151 Roundtrip, found 10 hours ago
$151
Roundtrip
found 10 hours ago
Select United flight, departing Mon, Sep 15 from Sky Harbor Intl. to George Bush Intercontinental, returning Tue, Sep 16, priced at $151 found 10 hours ago
Thu, Oct 16 - Sat, Oct 18
PHX
Sky Harbor Intl.
IAH
George Bush Intercontinental
$157 Roundtrip, found 3 days ago
$157
Roundtrip
found 3 days ago
Select United flight, departing Thu, Oct 16 from Sky Harbor Intl. to George Bush Intercontinental, returning Sat, Oct 18, priced at $157 found 3 days ago

Frequently asked questions

What route does flight number UA636 take?
You'll be landing into Newark, NJ Airport (EWR-Liberty Intl.) from Austin, TX Airport (AUS-Austin-Bergstrom Intl.) if you're traveling on flight number UA636. You'll be in the air for 3 hours and 37 minutes on this trip. It's also good to note that it conveniently operates non-stop.
What kind of plane is on flight number UA636?
The route for flight number UA636 is generally Austin, TX Airport (AUS-Austin-Bergstrom Intl.) to Newark Airport, and the Boeing 737-700 is the aircraft model you'll probably be traveling aboard.
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 UA636 flight with Travelocity, please visit our Customer Service Portal.