United Flight 678 Deals & Information (2026/2027)

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United Flight 678 Route Deals From $259

The cheapest prices found with in the last 7 days for return flights were $289 and $259 for one-way flights to George Bush Intercontinental for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Nov 26 - Sun, Nov 29
MFE
Miller Intl.
IAH
George Bush Intercontinental
$289 Roundtrip, found 6 days ago
$289
Roundtrip
found 6 days ago
Select United flight, departing Thu, Nov 26 from Miller Intl. to George Bush Intercontinental, returning Sun, Nov 29, priced at $289 found 6 days ago
Thu, Oct 15 - Tue, Oct 20
MFE
Miller Intl.
IAH
George Bush Intercontinental
$293 Roundtrip, found 1 day ago
$293
Roundtrip
found 1 day ago
Select United flight, departing Thu, Oct 15 from Miller Intl. to George Bush Intercontinental, returning Tue, Oct 20, priced at $293 found 1 day ago
Thu, Oct 15 - Sun, Oct 18
MFE
Miller Intl.
IAH
George Bush Intercontinental
$303 Roundtrip, found 3 days ago
$303
Roundtrip
found 3 days ago
Select United flight, departing Thu, Oct 15 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 18, priced at $303 found 3 days ago
Thu, Oct 15 - Tue, Oct 20
MFE
Miller Intl.
IAH
George Bush Intercontinental
$308 Roundtrip, found 1 day ago
$308
Roundtrip
found 1 day ago
Select United flight, departing Thu, Oct 15 from Miller Intl. to George Bush Intercontinental, returning Tue, Oct 20, priced at $308 found 1 day ago
Fri, Oct 16 - Sun, Oct 25
MFE
Miller Intl.
IAH
George Bush Intercontinental
$316 Roundtrip, found 2 days ago
$316
Roundtrip
found 2 days ago
Select United flight, departing Fri, Oct 16 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 25, priced at $316 found 2 days ago
Thu, Nov 26 - Sun, Nov 29
MFE
Miller Intl.
IAH
George Bush Intercontinental
$318 Roundtrip, found 6 days ago
$318
Roundtrip
found 6 days ago
Select United flight, departing Thu, Nov 26 from Miller Intl. to George Bush Intercontinental, returning Sun, Nov 29, priced at $318 found 6 days ago
Sat, Oct 3 - Sun, Oct 4
MFE
Miller Intl.
IAH
George Bush Intercontinental
$319 Roundtrip, found 5 hours ago
$319
Roundtrip
found 5 hours ago
Select United flight, departing Sat, Oct 3 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 4, priced at $319 found 5 hours ago
Fri, Oct 16 - Sun, Oct 25
MFE
Miller Intl.
IAH
George Bush Intercontinental
$322 Roundtrip, found 2 days ago
$322
Roundtrip
found 2 days ago
Select United flight, departing Fri, Oct 16 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 25, priced at $322 found 2 days ago
Fri, Oct 16 - Sun, Oct 18
MFE
Miller Intl.
IAH
George Bush Intercontinental
$323 Roundtrip, found 5 days ago
$323
Roundtrip
found 5 days ago
Select United flight, departing Fri, Oct 16 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 18, priced at $323 found 5 days ago
Sat, Oct 3 - Sun, Oct 4
MFE
Miller Intl.
IAH
George Bush Intercontinental
$328 Roundtrip, found 5 hours ago
$328
Roundtrip
found 5 hours ago
Select United flight, departing Sat, Oct 3 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 4, priced at $328 found 5 hours ago
Fri, Oct 16 - Sun, Oct 25
MFE
Miller Intl.
IAH
George Bush Intercontinental
$330 Roundtrip, found 2 days ago
$330
Roundtrip
found 2 days ago
Select United flight, departing Fri, Oct 16 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 25, priced at $330 found 2 days ago
Sat, Oct 3 - Sun, Oct 4
MFE
Miller Intl.
IAH
George Bush Intercontinental
$332 Roundtrip, found 5 hours ago
$332
Roundtrip
found 5 hours ago
Select United flight, departing Sat, Oct 3 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 4, priced at $332 found 5 hours ago
Thu, Oct 15 - Sun, Oct 18
MFE
Miller Intl.
IAH
George Bush Intercontinental
$334 Roundtrip, found 3 days ago
$334
Roundtrip
found 3 days ago
Select United flight, departing Thu, Oct 15 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 18, priced at $334 found 3 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.