United Flight 678 Deals & Information (2026/2027)

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United Flight 678 Route Deals From $259

The cheapest prices found with in the last 7 days for return flights were $293 and $259 for one-way flights to George Bush Intercontinental for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Nov 11 - Sat, Nov 14
MFE
Miller Intl.
IAH
George Bush Intercontinental
$293 Roundtrip, found 3 days ago
$293
Roundtrip
found 3 days ago
Select United flight, departing Wed, Nov 11 from Miller Intl. to George Bush Intercontinental, returning Sat, Nov 14, priced at $293 found 3 days ago
Wed, Nov 11 - Sat, Nov 14
MFE
Miller Intl.
IAH
George Bush Intercontinental
$313 Roundtrip, found 3 days ago
$313
Roundtrip
found 3 days ago
Select United flight, departing Wed, Nov 11 from Miller Intl. to George Bush Intercontinental, returning Sat, Nov 14, priced at $313 found 3 days ago
Thu, Oct 15 - Sun, Oct 18
MFE
Miller Intl.
IAH
George Bush Intercontinental
$324 Roundtrip, found 5 days ago
$324
Roundtrip
found 5 days ago
Select United flight, departing Thu, Oct 15 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 18, priced at $324 found 5 days ago
Thu, Oct 15 - Sun, Oct 18
MFE
Miller Intl.
IAH
George Bush Intercontinental
$347 Roundtrip, found 5 days ago
$347
Roundtrip
found 5 days ago
Select United flight, departing Thu, Oct 15 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 18, priced at $347 found 5 days ago
Thu, Oct 15 - Sun, Oct 18
MFE
Miller Intl.
IAH
George Bush Intercontinental
$354 Roundtrip, found 5 days ago
$354
Roundtrip
found 5 days ago
Select United flight, departing Thu, Oct 15 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 18, priced at $354 found 5 days ago
Wed, Nov 11 - Sat, Nov 14
MFE
Miller Intl.
IAH
George Bush Intercontinental
$356 Roundtrip, found 3 days ago
$356
Roundtrip
found 3 days ago
Select United flight, departing Wed, Nov 11 from Miller Intl. to George Bush Intercontinental, returning Sat, Nov 14, priced at $356 found 3 days ago
Fri, Oct 9 - Mon, Oct 12
MFE
Miller Intl.
IAH
George Bush Intercontinental
$364 Roundtrip, found 4 days ago
$364
Roundtrip
found 4 days ago
Select United flight, departing Fri, Oct 9 from Miller Intl. to George Bush Intercontinental, returning Mon, Oct 12, priced at $364 found 4 days ago
Thu, Oct 15 - Sun, Oct 18
MFE
Miller Intl.
IAH
George Bush Intercontinental
$366 Roundtrip, found 5 days ago
$366
Roundtrip
found 5 days ago
Select United flight, departing Thu, Oct 15 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 18, priced at $366 found 5 days ago
Thu, Oct 15 - Sun, Oct 18
MFE
Miller Intl.
IAH
George Bush Intercontinental
$377 Roundtrip, found 5 days ago
$377
Roundtrip
found 5 days ago
Select United flight, departing Thu, Oct 15 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 18, priced at $377 found 5 days ago
Wed, Nov 11 - Sat, Nov 14
MFE
Miller Intl.
IAH
George Bush Intercontinental
$388 Roundtrip, found 3 days ago
$388
Roundtrip
found 3 days ago
Select United flight, departing Wed, Nov 11 from Miller Intl. to George Bush Intercontinental, returning Sat, Nov 14, priced at $388 found 3 days ago
Fri, Oct 9 - Mon, Oct 12
MFE
Miller Intl.
IAH
George Bush Intercontinental
$392 Roundtrip, found 4 days ago
$392
Roundtrip
found 4 days ago
Select United flight, departing Fri, Oct 9 from Miller Intl. to George Bush Intercontinental, returning Mon, Oct 12, priced at $392 found 4 days ago
Fri, Oct 9 - Mon, Oct 12
MFE
Miller Intl.
IAH
George Bush Intercontinental
$397 Roundtrip, found 4 days ago
$397
Roundtrip
found 4 days ago
Select United flight, departing Fri, Oct 9 from Miller Intl. to George Bush Intercontinental, returning Mon, Oct 12, priced at $397 found 4 days ago
Thu, Oct 15 - Sun, Oct 18
MFE
Miller Intl.
IAH
George Bush Intercontinental
$408 Roundtrip, found 5 days ago
$408
Roundtrip
found 5 days ago
Select United flight, departing Thu, Oct 15 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 18, priced at $408 found 5 days ago
Thu, Oct 15 - Sun, Oct 18
MFE
Miller Intl.
IAH
George Bush Intercontinental
$415 Roundtrip, found 5 days ago
$415
Roundtrip
found 5 days ago
Select United flight, departing Thu, Oct 15 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 18, priced at $415 found 5 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.