United Flight 678 Deals & Information (2025/2026)

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United Flight 678 Route Deals From $103

The cheapest prices found with in the last 7 days for return flights were $183 and $103 for one-way flights to George Bush Intercontinental for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Oct 8 - Sun, Oct 19
MFE
Miller Intl.
IAH
George Bush Intercontinental
$183 Roundtrip, found 11 hours ago
$183
Roundtrip
found 11 hours ago
Select United flight, departing Wed, Oct 8 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 19, priced at $183 found 11 hours ago
Wed, Oct 8 - Sun, Oct 19
MFE
Miller Intl.
IAH
George Bush Intercontinental
$191 Roundtrip, found 11 hours ago
$191
Roundtrip
found 11 hours ago
Select United flight, departing Wed, Oct 8 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 19, priced at $191 found 11 hours ago
Fri, Sep 26 - Mon, Sep 29
MFE
Miller Intl.
IAH
George Bush Intercontinental
$197 Roundtrip, found 3 days ago
$197
Roundtrip
found 3 days ago
Select United flight, departing Fri, Sep 26 from Miller Intl. to George Bush Intercontinental, returning Mon, Sep 29, priced at $197 found 3 days ago
Thu, Oct 2 - Mon, Oct 6
MFE
Miller Intl.
IAH
George Bush Intercontinental
$197 Roundtrip, found 4 days ago
$197
Roundtrip
found 4 days ago
Select United flight, departing Thu, Oct 2 from Miller Intl. to George Bush Intercontinental, returning Mon, Oct 6, priced at $197 found 4 days ago
Wed, Oct 1 - Sun, Oct 5
MFE
Miller Intl.
IAH
George Bush Intercontinental
$198 Roundtrip, found 6 days ago
$198
Roundtrip
found 6 days ago
Select United flight, departing Wed, Oct 1 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 5, priced at $198 found 6 days ago
Tue, Sep 30 - Wed, Oct 1
MFE
Miller Intl.
IAH
George Bush Intercontinental
$203 Roundtrip, found 6 days ago
$203
Roundtrip
found 6 days ago
Select United flight, departing Tue, Sep 30 from Miller Intl. to George Bush Intercontinental, returning Wed, Oct 1, priced at $203 found 6 days ago
Sat, Sep 20 - Fri, Sep 26
MFE
Miller Intl.
IAH
George Bush Intercontinental
$207 Roundtrip, found 4 days ago
$207
Roundtrip
found 4 days ago
Select United flight, departing Sat, Sep 20 from Miller Intl. to George Bush Intercontinental, returning Fri, Sep 26, priced at $207 found 4 days ago
Wed, Oct 1 - Sun, Oct 5
MFE
Miller Intl.
IAH
George Bush Intercontinental
$208 Roundtrip, found 6 days ago
$208
Roundtrip
found 6 days ago
Select United flight, departing Wed, Oct 1 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 5, priced at $208 found 6 days ago
Tue, Sep 30 - Wed, Oct 1
MFE
Miller Intl.
IAH
George Bush Intercontinental
$212 Roundtrip, found 6 days ago
$212
Roundtrip
found 6 days ago
Select United flight, departing Tue, Sep 30 from Miller Intl. to George Bush Intercontinental, returning Wed, Oct 1, priced at $212 found 6 days ago
Sat, Sep 13 - Mon, Sep 15
MFE
Miller Intl.
IAH
George Bush Intercontinental
$214 Roundtrip, found 3 days ago
$214
Roundtrip
found 3 days ago
Select United flight, departing Sat, Sep 13 from Miller Intl. to George Bush Intercontinental, returning Mon, Sep 15, priced at $214 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.