United Flight 678 Deals & Information (2026/2027)

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United Flight 678 Route Deals From $254

The cheapest prices found with in the last 7 days for return flights were $339 and $254 for one-way flights to George Bush Intercontinental for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Sep 18 - Mon, Sep 21
MFE
Miller Intl.
IAH
George Bush Intercontinental
$339 Roundtrip, found 23 hours ago
$339
Roundtrip
found 23 hours ago
Select United flight, departing Fri, Sep 18 from Miller Intl. to George Bush Intercontinental, returning Mon, Sep 21, priced at $339 found 23 hours ago
Fri, Sep 18 - Mon, Sep 21
MFE
Miller Intl.
IAH
George Bush Intercontinental
$402 Roundtrip, found 23 hours ago
$402
Roundtrip
found 23 hours ago
Select United flight, departing Fri, Sep 18 from Miller Intl. to George Bush Intercontinental, returning Mon, Sep 21, priced at $402 found 23 hours ago
Fri, Sep 18 - Mon, Sep 21
MFE
Miller Intl.
IAH
George Bush Intercontinental
$410 Roundtrip, found 23 hours ago
$410
Roundtrip
found 23 hours ago
Select United flight, departing Fri, Sep 18 from Miller Intl. to George Bush Intercontinental, returning Mon, Sep 21, priced at $410 found 23 hours ago
Fri, Sep 18 - Mon, Sep 21
MFE
Miller Intl.
IAH
George Bush Intercontinental
$420 Roundtrip, found 23 hours ago
$420
Roundtrip
found 23 hours ago
Select United flight, departing Fri, Sep 18 from Miller Intl. to George Bush Intercontinental, returning Mon, Sep 21, priced at $420 found 23 hours ago
Thu, Sep 10 - Sun, Sep 13
MFE
Miller Intl.
IAH
George Bush Intercontinental
$434 Roundtrip, found 1 hour ago
$434
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Sep 10 from Miller Intl. to George Bush Intercontinental, returning Sun, Sep 13, priced at $434 found 1 hour ago
Thu, Sep 10 - Sun, Sep 13
MFE
Miller Intl.
IAH
George Bush Intercontinental
$465 Roundtrip, found 1 hour ago
$465
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Sep 10 from Miller Intl. to George Bush Intercontinental, returning Sun, Sep 13, priced at $465 found 1 hour ago
Fri, Sep 18 - Mon, Sep 21
MFE
Miller Intl.
IAH
George Bush Intercontinental
$473 Roundtrip, found 23 hours ago
$473
Roundtrip
found 23 hours ago
Select United flight, departing Fri, Sep 18 from Miller Intl. to George Bush Intercontinental, returning Mon, Sep 21, priced at $473 found 23 hours ago
Fri, Sep 18 - Mon, Sep 21
MFE
Miller Intl.
IAH
George Bush Intercontinental
$475 Roundtrip, found 23 hours ago
$475
Roundtrip
found 23 hours ago
Select United flight, departing Fri, Sep 18 from Miller Intl. to George Bush Intercontinental, returning Mon, Sep 21, priced at $475 found 23 hours ago
Fri, Sep 18 - Mon, Sep 21
MFE
Miller Intl.
IAH
George Bush Intercontinental
$483 Roundtrip, found 23 hours ago
$483
Roundtrip
found 23 hours ago
Select United flight, departing Fri, Sep 18 from Miller Intl. to George Bush Intercontinental, returning Mon, Sep 21, priced at $483 found 23 hours ago
Fri, Sep 18 - Mon, Sep 21
MFE
Miller Intl.
IAH
George Bush Intercontinental
$491 Roundtrip, found 23 hours ago
$491
Roundtrip
found 23 hours ago
Select United flight, departing Fri, Sep 18 from Miller Intl. to George Bush Intercontinental, returning Mon, Sep 21, priced at $491 found 23 hours ago
Thu, Sep 10 - Sun, Sep 13
MFE
Miller Intl.
IAH
George Bush Intercontinental
$505 Roundtrip, found 1 hour ago
$505
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Sep 10 from Miller Intl. to George Bush Intercontinental, returning Sun, Sep 13, priced at $505 found 1 hour ago
Thu, Sep 10 - Sun, Sep 13
MFE
Miller Intl.
IAH
George Bush Intercontinental
$536 Roundtrip, found 1 hour ago
$536
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Sep 10 from Miller Intl. to George Bush Intercontinental, returning Sun, Sep 13, priced at $536 found 1 hour ago
Fri, Sep 18 - Mon, Sep 21
MFE
Miller Intl.
IAH
George Bush Intercontinental
$554 Roundtrip, found 23 hours ago
$554
Roundtrip
found 23 hours ago
Select United flight, departing Fri, Sep 18 from Miller Intl. to George Bush Intercontinental, returning Mon, Sep 21, priced at $554 found 23 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.