United Flight 5478 Deals & Information (2025/2026)

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United Flight 5478 Route Deals From $109

The cheapest prices found with in the last 7 days for return flights were $164 and $109 for one-way flights to George Bush Intercontinental for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Aug 28 - Sun, Aug 31
STL
Lambert-St. Louis Intl.
IAH
George Bush Intercontinental
$164 Roundtrip, just found
$164
Roundtrip
just found
Select United flight, departing Thu, Aug 28 from Lambert-St. Louis Intl. to George Bush Intercontinental, returning Sun, Aug 31, priced at $164 just found
Mon, Aug 18 - Sun, Aug 24
STL
Lambert-St. Louis Intl.
IAH
George Bush Intercontinental
$184 Roundtrip, found 1 day ago
$184
Roundtrip
found 1 day ago
Select United flight, departing Mon, Aug 18 from Lambert-St. Louis Intl. to George Bush Intercontinental, returning Sun, Aug 24, priced at $184 found 1 day ago
Thu, Aug 28 - Sun, Aug 31
STL
Lambert-St. Louis Intl.
IAH
George Bush Intercontinental
$192 Roundtrip, just found
$192
Roundtrip
just found
Select United flight, departing Thu, Aug 28 from Lambert-St. Louis Intl. to George Bush Intercontinental, returning Sun, Aug 31, priced at $192 just found
Thu, Aug 28 - Sun, Aug 31
STL
Lambert-St. Louis Intl.
IAH
George Bush Intercontinental
$201 Roundtrip, just found
$201
Roundtrip
just found
Select United flight, departing Thu, Aug 28 from Lambert-St. Louis Intl. to George Bush Intercontinental, returning Sun, Aug 31, priced at $201 just found
Thu, Aug 14 - Sun, Aug 17
STL
Lambert-St. Louis Intl.
IAH
George Bush Intercontinental
$205 Roundtrip, found 4 days ago
$205
Roundtrip
found 4 days ago
Select United flight, departing Thu, Aug 14 from Lambert-St. Louis Intl. to George Bush Intercontinental, returning Sun, Aug 17, priced at $205 found 4 days ago
Sat, Sep 13 - Sat, Sep 20
STL
Lambert-St. Louis Intl.
IAH
George Bush Intercontinental
$219 Roundtrip, found 2 days ago
$219
Roundtrip
found 2 days ago
Select United flight, departing Sat, Sep 13 from Lambert-St. Louis Intl. to George Bush Intercontinental, returning Sat, Sep 20, priced at $219 found 2 days ago
Wed, Oct 22 - Mon, Oct 27
STL
Lambert-St. Louis Intl.
IAH
George Bush Intercontinental
$230 Roundtrip, found 1 day ago
$230
Roundtrip
found 1 day ago
Select United flight, departing Wed, Oct 22 from Lambert-St. Louis Intl. to George Bush Intercontinental, returning Mon, Oct 27, priced at $230 found 1 day ago
Thu, Sep 25 - Fri, Sep 26
STL
Lambert-St. Louis Intl.
IAH
George Bush Intercontinental
$234 Roundtrip, found 1 hour ago
$234
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Sep 25 from Lambert-St. Louis Intl. to George Bush Intercontinental, returning Fri, Sep 26, priced at $234 found 1 hour ago
Thu, Aug 28 - Sun, Aug 31
STL
Lambert-St. Louis Intl.
IAH
George Bush Intercontinental
$236 Roundtrip, just found
$236
Roundtrip
just found
Select United flight, departing Thu, Aug 28 from Lambert-St. Louis Intl. to George Bush Intercontinental, returning Sun, Aug 31, priced at $236 just found
Thu, Aug 28 - Sun, Aug 31
STL
Lambert-St. Louis Intl.
IAH
George Bush Intercontinental
$236 Roundtrip, just found
$236
Roundtrip
just found
Select United flight, departing Thu, Aug 28 from Lambert-St. Louis Intl. to George Bush Intercontinental, returning Sun, Aug 31, priced at $236 just found

Frequently asked questions

What route does flight number UA5478 take?
UA5478 flies direct from Lambert-St. Louis Intl. Airport (STL) to DEN in around 2 hours and 17 minutes. It can sometimes take other routes though, some of which could be multi-stop trips. Keep this in mind when locking in your airfare to avoid any confusion.
What terminal does UA5478 fly out of?
If you're leaving from St. Louis, MO Airport (STL-Lambert-St. Louis Intl.), there's a fair chance you'll board from Terminal 1. The most traveled route for flight number UA5478 is STL to DEN, which is a direct flight.
What kind of plane is on flight number UA5478?
It's highly likely you'll be traveling aboard an Embraer 175 if you've booked a fare on flight number UA5478 from St. Louis, MO Airport (STL-Lambert-St. Louis Intl.) to Denver, CO Airport (DEN-Denver Intl.). This is the most commonly used type of plane on this popular route.
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 UA5478 flight with Travelocity, please visit our Customer Service Portal.