United Flight 678 Deals & Information (2025/2026)

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United Flight 678 Route Deals From $105

The cheapest prices found with in the last 7 days for return flights were $179 and $105 for one-way flights to George Bush Intercontinental for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Nov 7 - Sun, Nov 9
MFE
Miller Intl.
IAH
George Bush Intercontinental
$179 Roundtrip, found 6 days ago
$179
Roundtrip
found 6 days ago
Select United flight, departing Fri, Nov 7 from Miller Intl. to George Bush Intercontinental, returning Sun, Nov 9, priced at $179 found 6 days ago
Fri, Oct 10 - Sun, Oct 12
MFE
Miller Intl.
IAH
George Bush Intercontinental
$192 Roundtrip, found 6 days ago
$192
Roundtrip
found 6 days ago
Select United flight, departing Fri, Oct 10 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 12, priced at $192 found 6 days ago
Fri, Oct 10 - Tue, Oct 14
MFE
Miller Intl.
IAH
George Bush Intercontinental
$192 Roundtrip, found 4 days ago
$192
Roundtrip
found 4 days ago
Select United flight, departing Fri, Oct 10 from Miller Intl. to George Bush Intercontinental, returning Tue, Oct 14, priced at $192 found 4 days ago
Wed, Oct 8 - Sun, Oct 19
MFE
Miller Intl.
IAH
George Bush Intercontinental
$202 Roundtrip, found 5 hours ago
$202
Roundtrip
found 5 hours ago
Select United flight, departing Wed, Oct 8 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 19, priced at $202 found 5 hours ago
Wed, Oct 8 - Sun, Oct 19
MFE
Miller Intl.
IAH
George Bush Intercontinental
$211 Roundtrip, found 5 hours ago
$211
Roundtrip
found 5 hours ago
Select United flight, departing Wed, Oct 8 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 19, priced at $211 found 5 hours ago
Fri, Oct 10 - Tue, Oct 14
MFE
Miller Intl.
IAH
George Bush Intercontinental
$222 Roundtrip, found 4 days ago
$222
Roundtrip
found 4 days ago
Select United flight, departing Fri, Oct 10 from Miller Intl. to George Bush Intercontinental, returning Tue, Oct 14, priced at $222 found 4 days ago
Fri, Oct 10 - Sun, Oct 12
MFE
Miller Intl.
IAH
George Bush Intercontinental
$224 Roundtrip, found 6 days ago
$224
Roundtrip
found 6 days ago
Select United flight, departing Fri, Oct 10 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 12, priced at $224 found 6 days ago
Fri, Nov 7 - Sun, Nov 9
MFE
Miller Intl.
IAH
George Bush Intercontinental
$235 Roundtrip, found 6 days ago
$235
Roundtrip
found 6 days ago
Select United flight, departing Fri, Nov 7 from Miller Intl. to George Bush Intercontinental, returning Sun, Nov 9, priced at $235 found 6 days ago
Fri, Nov 7 - Sun, Nov 9
MFE
Miller Intl.
IAH
George Bush Intercontinental
$239 Roundtrip, found 6 days ago
$239
Roundtrip
found 6 days ago
Select United flight, departing Fri, Nov 7 from Miller Intl. to George Bush Intercontinental, returning Sun, Nov 9, priced at $239 found 6 days ago
Wed, Oct 8 - Sun, Oct 19
MFE
Miller Intl.
IAH
George Bush Intercontinental
$243 Roundtrip, found 5 hours ago
$243
Roundtrip
found 5 hours ago
Select United flight, departing Wed, Oct 8 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 19, priced at $243 found 5 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.