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 $175

The cheapest prices found with in the last 7 days for return flights were $179 and $175 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 9 hours ago
$179
Roundtrip
found 9 hours ago
Select United flight, departing Fri, Feb 6 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 8, priced at $179 found 9 hours ago
Fri, Feb 20 - Sun, Feb 22
MFE
Miller Intl.
IAH
George Bush Intercontinental
$184 Roundtrip, found 4 days ago
$184
Roundtrip
found 4 days ago
Select United flight, departing Fri, Feb 20 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 22, priced at $184 found 4 days ago
Fri, Feb 6 - Sun, Feb 8
MFE
Miller Intl.
IAH
George Bush Intercontinental
$190 Roundtrip, found 9 hours ago
$190
Roundtrip
found 9 hours ago
Select United flight, departing Fri, Feb 6 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 8, priced at $190 found 9 hours ago
Fri, Feb 20 - Sun, Feb 22
MFE
Miller Intl.
IAH
George Bush Intercontinental
$199 Roundtrip, found 4 days ago
$199
Roundtrip
found 4 days ago
Select United flight, departing Fri, Feb 20 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 22, priced at $199 found 4 days ago
Fri, Feb 6 - Sun, Feb 8
MFE
Miller Intl.
IAH
George Bush Intercontinental
$217 Roundtrip, found 9 hours ago
$217
Roundtrip
found 9 hours ago
Select United flight, departing Fri, Feb 6 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 8, priced at $217 found 9 hours ago
Fri, Feb 20 - Sun, Feb 22
MFE
Miller Intl.
IAH
George Bush Intercontinental
$226 Roundtrip, found 4 days ago
$226
Roundtrip
found 4 days ago
Select United flight, departing Fri, Feb 20 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 22, priced at $226 found 4 days ago
Thu, Jan 15 - Sun, Jan 18
MFE
Miller Intl.
IAH
George Bush Intercontinental
$230 Roundtrip, found 1 day ago
$230
Roundtrip
found 1 day ago
Select United flight, departing Thu, Jan 15 from Miller Intl. to George Bush Intercontinental, returning Sun, Jan 18, priced at $230 found 1 day ago
Fri, Feb 6 - Sun, Feb 8
MFE
Miller Intl.
IAH
George Bush Intercontinental
$234 Roundtrip, found 9 hours ago
$234
Roundtrip
found 9 hours ago
Select United flight, departing Fri, Feb 6 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 8, priced at $234 found 9 hours ago
Fri, Feb 6 - Sun, Feb 8
MFE
Miller Intl.
IAH
George Bush Intercontinental
$239 Roundtrip, found 9 hours ago
$239
Roundtrip
found 9 hours ago
Select United flight, departing Fri, Feb 6 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 8, priced at $239 found 9 hours ago
Fri, Feb 20 - Sun, Feb 22
MFE
Miller Intl.
IAH
George Bush Intercontinental
$240 Roundtrip, found 4 days ago
$240
Roundtrip
found 4 days ago
Select United flight, departing Fri, Feb 20 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 22, priced at $240 found 4 days 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.