United Flight 678 Deals & Information (2026/2027)

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United Flight 678 Route Deals From $245

The cheapest prices found with in the last 7 days for return flights were $245 and $245 for one-way flights to George Bush Intercontinental for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Jun 18 - Sun, Jun 21
MFE
Miller Intl.
IAH
George Bush Intercontinental
$245 Roundtrip, found 12 hours ago
$245
Roundtrip
found 12 hours ago
Select United flight, departing Thu, Jun 18 from Miller Intl. to George Bush Intercontinental, returning Sun, Jun 21, priced at $245 found 12 hours ago
Thu, Jun 18 - Sun, Jun 21
MFE
Miller Intl.
IAH
George Bush Intercontinental
$281 Roundtrip, found 12 hours ago
$281
Roundtrip
found 12 hours ago
Select United flight, departing Thu, Jun 18 from Miller Intl. to George Bush Intercontinental, returning Sun, Jun 21, priced at $281 found 12 hours ago
Thu, Jun 18 - Sun, Jun 21
MFE
Miller Intl.
IAH
George Bush Intercontinental
$292 Roundtrip, found 12 hours ago
$292
Roundtrip
found 12 hours ago
Select United flight, departing Thu, Jun 18 from Miller Intl. to George Bush Intercontinental, returning Sun, Jun 21, priced at $292 found 12 hours ago
Thu, Jun 18 - Sun, Jun 21
MFE
Miller Intl.
IAH
George Bush Intercontinental
$299 Roundtrip, found 12 hours ago
$299
Roundtrip
found 12 hours ago
Select United flight, departing Thu, Jun 18 from Miller Intl. to George Bush Intercontinental, returning Sun, Jun 21, priced at $299 found 12 hours ago
Thu, Jun 18 - Sun, Jun 21
MFE
Miller Intl.
IAH
George Bush Intercontinental
$316 Roundtrip, found 12 hours ago
$316
Roundtrip
found 12 hours ago
Select United flight, departing Thu, Jun 18 from Miller Intl. to George Bush Intercontinental, returning Sun, Jun 21, priced at $316 found 12 hours ago
Fri, Sep 18 - Sun, Sep 20
MFE
Miller Intl.
IAH
George Bush Intercontinental
$319 Roundtrip, found 4 days ago
$319
Roundtrip
found 4 days ago
Select United flight, departing Fri, Sep 18 from Miller Intl. to George Bush Intercontinental, returning Sun, Sep 20, priced at $319 found 4 days ago
Thu, Jun 18 - Sun, Jun 21
MFE
Miller Intl.
IAH
George Bush Intercontinental
$322 Roundtrip, found 12 hours ago
$322
Roundtrip
found 12 hours ago
Select United flight, departing Thu, Jun 18 from Miller Intl. to George Bush Intercontinental, returning Sun, Jun 21, priced at $322 found 12 hours ago
Thu, Jun 18 - Sun, Jun 21
MFE
Miller Intl.
IAH
George Bush Intercontinental
$327 Roundtrip, found 12 hours ago
$327
Roundtrip
found 12 hours ago
Select United flight, departing Thu, Jun 18 from Miller Intl. to George Bush Intercontinental, returning Sun, Jun 21, priced at $327 found 12 hours ago
Thu, Jun 18 - Sun, Jun 21
MFE
Miller Intl.
IAH
George Bush Intercontinental
$328 Roundtrip, found 12 hours ago
$328
Roundtrip
found 12 hours ago
Select United flight, departing Thu, Jun 18 from Miller Intl. to George Bush Intercontinental, returning Sun, Jun 21, priced at $328 found 12 hours ago
Fri, Sep 18 - Sun, Sep 20
MFE
Miller Intl.
IAH
George Bush Intercontinental
$330 Roundtrip, found 4 days ago
$330
Roundtrip
found 4 days ago
Select United flight, departing Fri, Sep 18 from Miller Intl. to George Bush Intercontinental, returning Sun, Sep 20, priced at $330 found 4 days ago
Fri, Sep 18 - Sun, Sep 20
MFE
Miller Intl.
IAH
George Bush Intercontinental
$332 Roundtrip, found 4 days ago
$332
Roundtrip
found 4 days ago
Select United flight, departing Fri, Sep 18 from Miller Intl. to George Bush Intercontinental, returning Sun, Sep 20, priced at $332 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.