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 $269 and $259 for one-way flights to George Bush Intercontinental for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Oct 17 - Sun, Oct 25
MFE
Miller Intl.
IAH
George Bush Intercontinental
$269 Roundtrip, found 8 hours ago
$269
Roundtrip
found 8 hours ago
Select United flight, departing Sat, Oct 17 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 25, priced at $269 found 8 hours ago
Fri, Oct 16 - Sat, Oct 24
MFE
Miller Intl.
IAH
George Bush Intercontinental
$273 Roundtrip, found 8 hours ago
$273
Roundtrip
found 8 hours ago
Select United flight, departing Fri, Oct 16 from Miller Intl. to George Bush Intercontinental, returning Sat, Oct 24, priced at $273 found 8 hours ago
Sat, Oct 17 - Sun, Oct 25
MFE
Miller Intl.
IAH
George Bush Intercontinental
$284 Roundtrip, found 8 hours ago
$284
Roundtrip
found 8 hours ago
Select United flight, departing Sat, Oct 17 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 25, priced at $284 found 8 hours ago
Sat, Oct 17 - Sun, Oct 25
MFE
Miller Intl.
IAH
George Bush Intercontinental
$305 Roundtrip, found 8 hours ago
$305
Roundtrip
found 8 hours ago
Select United flight, departing Sat, Oct 17 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 25, priced at $305 found 8 hours ago
Fri, Oct 16 - Sat, Oct 24
MFE
Miller Intl.
IAH
George Bush Intercontinental
$309 Roundtrip, found 8 hours ago
$309
Roundtrip
found 8 hours ago
Select United flight, departing Fri, Oct 16 from Miller Intl. to George Bush Intercontinental, returning Sat, Oct 24, priced at $309 found 8 hours ago
Sat, Oct 17 - Sun, Oct 25
MFE
Miller Intl.
IAH
George Bush Intercontinental
$319 Roundtrip, found 8 hours ago
$319
Roundtrip
found 8 hours ago
Select United flight, departing Sat, Oct 17 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 25, priced at $319 found 8 hours ago
Fri, Oct 16 - Sat, Oct 24
MFE
Miller Intl.
IAH
George Bush Intercontinental
$323 Roundtrip, found 8 hours ago
$323
Roundtrip
found 8 hours ago
Select United flight, departing Fri, Oct 16 from Miller Intl. to George Bush Intercontinental, returning Sat, Oct 24, priced at $323 found 8 hours ago
Fri, Sep 18 - Mon, Sep 21
MFE
Miller Intl.
IAH
George Bush Intercontinental
$334 Roundtrip, found 6 hours ago
$334
Roundtrip
found 6 hours ago
Select United flight, departing Fri, Sep 18 from Miller Intl. to George Bush Intercontinental, returning Mon, Sep 21, priced at $334 found 6 hours ago
Sat, Oct 17 - Sun, Oct 25
MFE
Miller Intl.
IAH
George Bush Intercontinental
$334 Roundtrip, found 8 hours ago
$334
Roundtrip
found 8 hours ago
Select United flight, departing Sat, Oct 17 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 25, priced at $334 found 8 hours ago
Sat, Oct 17 - Sun, Oct 25
MFE
Miller Intl.
IAH
George Bush Intercontinental
$339 Roundtrip, found 8 hours ago
$339
Roundtrip
found 8 hours ago
Select United flight, departing Sat, Oct 17 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 25, priced at $339 found 8 hours ago
Fri, Oct 16 - Sat, Oct 24
MFE
Miller Intl.
IAH
George Bush Intercontinental
$344 Roundtrip, found 8 hours ago
$344
Roundtrip
found 8 hours ago
Select United flight, departing Fri, Oct 16 from Miller Intl. to George Bush Intercontinental, returning Sat, Oct 24, priced at $344 found 8 hours ago
Sat, Oct 17 - Sun, Oct 25
MFE
Miller Intl.
IAH
George Bush Intercontinental
$354 Roundtrip, found 8 hours ago
$354
Roundtrip
found 8 hours ago
Select United flight, departing Sat, Oct 17 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 25, priced at $354 found 8 hours ago
Fri, Oct 16 - Sat, Oct 24
MFE
Miller Intl.
IAH
George Bush Intercontinental
$359 Roundtrip, found 8 hours ago
$359
Roundtrip
found 8 hours ago
Select United flight, departing Fri, Oct 16 from Miller Intl. to George Bush Intercontinental, returning Sat, Oct 24, priced at $359 found 8 hours ago
Sat, Oct 17 - Sun, Oct 25
MFE
Miller Intl.
IAH
George Bush Intercontinental
$365 Roundtrip, found 8 hours ago
$365
Roundtrip
found 8 hours ago
Select United flight, departing Sat, Oct 17 from Miller Intl. to George Bush Intercontinental, returning Sun, Oct 25, priced at $365 found 8 hours ago
Fri, Sep 18 - Mon, Sep 21
MFE
Miller Intl.
IAH
George Bush Intercontinental
$367 Roundtrip, found 6 hours ago
$367
Roundtrip
found 6 hours ago
Select United flight, departing Fri, Sep 18 from Miller Intl. to George Bush Intercontinental, returning Mon, Sep 21, priced at $367 found 6 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.