United Flight 678 Deals & Information (2026/2027)

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United Flight 678 Route Deals From $201

The cheapest prices found with in the last 7 days for return flights were $179 and $201 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 1 hour ago
$179
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Feb 6 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 8, priced at $179 found 1 hour ago
Fri, Jan 30 - Mon, Feb 2
MFE
Miller Intl.
IAH
George Bush Intercontinental
$184 Roundtrip, found 17 hours ago
$184
Roundtrip
found 17 hours ago
Select United flight, departing Fri, Jan 30 from Miller Intl. to George Bush Intercontinental, returning Mon, Feb 2, priced at $184 found 17 hours ago
Fri, Feb 6 - Sun, Feb 8
MFE
Miller Intl.
IAH
George Bush Intercontinental
$217 Roundtrip, found 1 hour ago
$217
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Feb 6 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 8, priced at $217 found 1 hour ago
Sat, Jan 17 - Sat, Jan 24
MFE
Miller Intl.
IAH
George Bush Intercontinental
$224 Roundtrip, found 3 days ago
$224
Roundtrip
found 3 days ago
Select United flight, departing Sat, Jan 17 from Miller Intl. to George Bush Intercontinental, returning Sat, Jan 24, priced at $224 found 3 days ago
Fri, Feb 6 - Sun, Feb 8
MFE
Miller Intl.
IAH
George Bush Intercontinental
$239 Roundtrip, found 1 hour ago
$239
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Feb 6 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 8, priced at $239 found 1 hour ago
Thu, Jan 15 - Sun, Jan 18
MFE
Miller Intl.
IAH
George Bush Intercontinental
$245 Roundtrip, found 1 hour ago
$245
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Jan 15 from Miller Intl. to George Bush Intercontinental, returning Sun, Jan 18, priced at $245 found 1 hour ago
Fri, Feb 6 - Sun, Feb 8
MFE
Miller Intl.
IAH
George Bush Intercontinental
$250 Roundtrip, found 1 hour ago
$250
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Feb 6 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 8, priced at $250 found 1 hour ago
Sat, Jan 17 - Sat, Jan 24
MFE
Miller Intl.
IAH
George Bush Intercontinental
$252 Roundtrip, found 3 days ago
$252
Roundtrip
found 3 days ago
Select United flight, departing Sat, Jan 17 from Miller Intl. to George Bush Intercontinental, returning Sat, Jan 24, priced at $252 found 3 days ago
Fri, Jan 30 - Mon, Feb 2
MFE
Miller Intl.
IAH
George Bush Intercontinental
$256 Roundtrip, found 17 hours ago
$256
Roundtrip
found 17 hours ago
Select United flight, departing Fri, Jan 30 from Miller Intl. to George Bush Intercontinental, returning Mon, Feb 2, priced at $256 found 17 hours ago
Fri, Jan 30 - Mon, Feb 2
MFE
Miller Intl.
IAH
George Bush Intercontinental
$261 Roundtrip, found 17 hours ago
$261
Roundtrip
found 17 hours ago
Select United flight, departing Fri, Jan 30 from Miller Intl. to George Bush Intercontinental, returning Mon, Feb 2, priced at $261 found 17 hours ago
Fri, Jan 30 - Mon, Feb 2
MFE
Miller Intl.
IAH
George Bush Intercontinental
$271 Roundtrip, found 17 hours ago
$271
Roundtrip
found 17 hours ago
Select United flight, departing Fri, Jan 30 from Miller Intl. to George Bush Intercontinental, returning Mon, Feb 2, priced at $271 found 17 hours ago
Fri, Feb 6 - Sun, Feb 8
MFE
Miller Intl.
IAH
George Bush Intercontinental
$277 Roundtrip, found 1 hour ago
$277
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Feb 6 from Miller Intl. to George Bush Intercontinental, returning Sun, Feb 8, priced at $277 found 1 hour 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.