United Flight 678 Deals & Information (2025/2026)

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United Flight 678 Route Deals From $145

The cheapest prices found with in the last 7 days for return flights were $183 and $145 for one-way flights to George Bush Intercontinental for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Nov 27 - Sat, Nov 29
MFE
Miller Intl.
IAH
George Bush Intercontinental
$183 Roundtrip, found 4 days ago
$183
Roundtrip
found 4 days ago
Select United flight, departing Thu, Nov 27 from Miller Intl. to George Bush Intercontinental, returning Sat, Nov 29, priced at $183 found 4 days ago
Fri, Nov 14 - Sun, Nov 16
MFE
Miller Intl.
IAH
George Bush Intercontinental
$218 Roundtrip, found 5 days ago
$218
Roundtrip
found 5 days ago
Select United flight, departing Fri, Nov 14 from Miller Intl. to George Bush Intercontinental, returning Sun, Nov 16, priced at $218 found 5 days ago
Fri, Nov 7 - Sun, Nov 9
MFE
Miller Intl.
IAH
George Bush Intercontinental
$219 Roundtrip, found 3 days ago
$219
Roundtrip
found 3 days ago
Select United flight, departing Fri, Nov 7 from Miller Intl. to George Bush Intercontinental, returning Sun, Nov 9, priced at $219 found 3 days ago
Fri, Nov 28 - Sun, Nov 30
MFE
Miller Intl.
IAH
George Bush Intercontinental
$231 Roundtrip, found 4 days ago
$231
Roundtrip
found 4 days ago
Select United flight, departing Fri, Nov 28 from Miller Intl. to George Bush Intercontinental, returning Sun, Nov 30, priced at $231 found 4 days ago
Fri, Nov 14 - Sun, Nov 16
MFE
Miller Intl.
IAH
George Bush Intercontinental
$242 Roundtrip, found 5 days ago
$242
Roundtrip
found 5 days ago
Select United flight, departing Fri, Nov 14 from Miller Intl. to George Bush Intercontinental, returning Sun, Nov 16, priced at $242 found 5 days ago
Fri, Nov 7 - Sun, Nov 9
MFE
Miller Intl.
IAH
George Bush Intercontinental
$255 Roundtrip, found 3 days ago
$255
Roundtrip
found 3 days ago
Select United flight, departing Fri, Nov 7 from Miller Intl. to George Bush Intercontinental, returning Sun, Nov 9, priced at $255 found 3 days ago
Wed, Nov 26 - Sun, Nov 30
MFE
Miller Intl.
IAH
George Bush Intercontinental
$257 Roundtrip, found 2 days ago
$257
Roundtrip
found 2 days ago
Select United flight, departing Wed, Nov 26 from Miller Intl. to George Bush Intercontinental, returning Sun, Nov 30, priced at $257 found 2 days ago
Fri, Nov 7 - Sun, Nov 9
MFE
Miller Intl.
IAH
George Bush Intercontinental
$262 Roundtrip, found 3 days ago
$262
Roundtrip
found 3 days ago
Select United flight, departing Fri, Nov 7 from Miller Intl. to George Bush Intercontinental, returning Sun, Nov 9, priced at $262 found 3 days ago
Fri, Nov 7 - Sun, Nov 9
MFE
Miller Intl.
IAH
George Bush Intercontinental
$263 Roundtrip, found 3 days ago
$263
Roundtrip
found 3 days ago
Select United flight, departing Fri, Nov 7 from Miller Intl. to George Bush Intercontinental, returning Sun, Nov 9, priced at $263 found 3 days ago
Fri, Nov 28 - Sun, Nov 30
MFE
Miller Intl.
IAH
George Bush Intercontinental
$265 Roundtrip, found 4 days ago
$265
Roundtrip
found 4 days ago
Select United flight, departing Fri, Nov 28 from Miller Intl. to George Bush Intercontinental, returning Sun, Nov 30, priced at $265 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.