United Flight 678 Deals & Information (2026/2027)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

United Flight 678 Route Deals From $149

The cheapest prices found with in the last 7 days for return flights were $179 and $149 for one-way flights to George Bush Intercontinental for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Feb 6 - Sun, Feb 8
MFE
Miller Intl.
IAH
George Bush Intercontinental
$179 Roundtrip, found 7 hours ago
$179
Roundtrip
found 7 hours ago
Select United flight, departing Fri, Feb 6 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 8, priced at $179 found 7 hours ago
Thu, Feb 12 - Sun, Feb 15
MFE
Miller Intl.
IAH
George Bush Intercontinental
$182 Roundtrip, found 6 hours ago
$182
Roundtrip
found 6 hours ago
Select United flight, departing Thu, Feb 12 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 15, priced at $182 found 6 hours ago
Fri, Jan 30 - Mon, Feb 2
MFE
Miller Intl.
IAH
George Bush Intercontinental
$184 Roundtrip, found 6 days ago
$184
Roundtrip
found 6 days ago
Select United flight, departing Fri, Jan 30 from Miller Intl. to George Bush Intercontinental, returning Mon, Feb 2, priced at $184 found 6 days ago
Fri, Feb 6 - Sun, Feb 8
MFE
Miller Intl.
IAH
George Bush Intercontinental
$187 Roundtrip, found 7 hours ago
$187
Roundtrip
found 7 hours ago
Select United flight, departing Fri, Feb 6 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 8, priced at $187 found 7 hours ago
Thu, Feb 12 - Sun, Feb 15
MFE
Miller Intl.
IAH
George Bush Intercontinental
$219 Roundtrip, found 6 hours ago
$219
Roundtrip
found 6 hours ago
Select United flight, departing Thu, Feb 12 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 15, priced at $219 found 6 hours ago
Fri, Feb 6 - Sun, Feb 8
MFE
Miller Intl.
IAH
George Bush Intercontinental
$220 Roundtrip, found 7 hours ago
$220
Roundtrip
found 7 hours ago
Select United flight, departing Fri, Feb 6 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 8, priced at $220 found 7 hours ago
Thu, Feb 12 - Sun, Feb 15
MFE
Miller Intl.
IAH
George Bush Intercontinental
$237 Roundtrip, found 6 hours ago
$237
Roundtrip
found 6 hours ago
Select United flight, departing Thu, Feb 12 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 15, priced at $237 found 6 hours ago
Fri, Feb 6 - Sun, Feb 8
MFE
Miller Intl.
IAH
George Bush Intercontinental
$239 Roundtrip, found 7 hours ago
$239
Roundtrip
found 7 hours ago
Select United flight, departing Fri, Feb 6 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 8, priced at $239 found 7 hours ago
Thu, Feb 12 - Sun, Feb 15
MFE
Miller Intl.
IAH
George Bush Intercontinental
$242 Roundtrip, found 6 hours ago
$242
Roundtrip
found 6 hours ago
Select United flight, departing Thu, Feb 12 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 15, priced at $242 found 6 hours ago
Fri, Feb 6 - Sun, Feb 8
MFE
Miller Intl.
IAH
George Bush Intercontinental
$247 Roundtrip, found 7 hours ago
$247
Roundtrip
found 7 hours ago
Select United flight, departing Fri, Feb 6 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 8, priced at $247 found 7 hours ago

Frequently asked questions

What route does flight number UA678 take?
Flight number UA678 operates directly from Washington, DC Airport (IAD-Washington Dulles Intl.) to MIA. During this trip, you'll be in the air for 2 hours and 40 minutes. Consider booking ahead to secure your favorite seat.
What kind of plane is on flight number UA678?
The route for UA678 is generally Washington, DC Airport (IAD-Washington Dulles Intl.) to MIA, and the Airbus A319 is the type of aircraft you'll probably be heading off on.
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 UA678 flight with Travelocity, please visit our Customer Service Portal.