United Flight 2100 Deals & Information (2026/2027)

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United Flight 2100 Route Deals From $289

The cheapest prices found with in the last 7 days for return flights were $259 and $289 for one-way flights to Great Falls Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Aug 25 - Sat, Aug 29
DEN
Denver Intl.
GTF
Great Falls Intl.
$259 Roundtrip, found 1 day ago
$259
Roundtrip
found 1 day ago
Select United flight, departing Tue, Aug 25 from Denver Intl. to Great Falls Intl., returning Sat, Aug 29, priced at $259 found 1 day ago
Tue, Aug 25 - Sat, Aug 29
DEN
Denver Intl.
GTF
Great Falls Intl.
$293 Roundtrip, found 1 day ago
$293
Roundtrip
found 1 day ago
Select United flight, departing Tue, Aug 25 from Denver Intl. to Great Falls Intl., returning Sat, Aug 29, priced at $293 found 1 day ago
Thu, Sep 3 - Wed, Sep 9
DEN
Denver Intl.
GTF
Great Falls Intl.
$303 Roundtrip, found 2 days ago
$303
Roundtrip
found 2 days ago
Select United flight, departing Thu, Sep 3 from Denver Intl. to Great Falls Intl., returning Wed, Sep 9, priced at $303 found 2 days ago
Thu, Jul 30 - Sun, Aug 2
DEN
Denver Intl.
GTF
Great Falls Intl.
$327 Roundtrip, found 6 days ago
$327
Roundtrip
found 6 days ago
Select United flight, departing Thu, Jul 30 from Denver Intl. to Great Falls Intl., returning Sun, Aug 2, priced at $327 found 6 days ago
Thu, Sep 3 - Wed, Sep 9
DEN
Denver Intl.
GTF
Great Falls Intl.
$337 Roundtrip, found 2 days ago
$337
Roundtrip
found 2 days ago
Select United flight, departing Thu, Sep 3 from Denver Intl. to Great Falls Intl., returning Wed, Sep 9, priced at $337 found 2 days ago
Sat, May 23 - Tue, May 26
DEN
Denver Intl.
GTF
Great Falls Intl.
$342 Roundtrip, found 5 days ago
$342
Roundtrip
found 5 days ago
Select United flight, departing Sat, May 23 from Denver Intl. to Great Falls Intl., returning Tue, May 26, priced at $342 found 5 days ago
Fri, Jul 10 - Tue, Jul 14
DEN
Denver Intl.
GTF
Great Falls Intl.
$345 Roundtrip, found 6 days ago
$345
Roundtrip
found 6 days ago
Select United flight, departing Fri, Jul 10 from Denver Intl. to Great Falls Intl., returning Tue, Jul 14, priced at $345 found 6 days ago
Thu, Jul 30 - Mon, Aug 3
DEN
Denver Intl.
GTF
Great Falls Intl.
$349 Roundtrip, found 5 days ago
$349
Roundtrip
found 5 days ago
Select United flight, departing Thu, Jul 30 from Denver Intl. to Great Falls Intl., returning Mon, Aug 3, priced at $349 found 5 days ago
Tue, Aug 25 - Sat, Aug 29
DEN
Denver Intl.
GTF
Great Falls Intl.
$373 Roundtrip, found 1 day ago
$373
Roundtrip
found 1 day ago
Select United flight, departing Tue, Aug 25 from Denver Intl. to Great Falls Intl., returning Sat, Aug 29, priced at $373 found 1 day ago
Sat, May 23 - Sun, May 24
DEN
Denver Intl.
GTF
Great Falls Intl.
$376 Roundtrip, found 1 day ago
$376
Roundtrip
found 1 day ago
Select United flight, departing Sat, May 23 from Denver Intl. to Great Falls Intl., returning Sun, May 24, priced at $376 found 1 day ago
Wed, Jul 1 - Fri, Jul 10
DEN
Denver Intl.
GTF
Great Falls Intl.
$381 Roundtrip, found 6 days ago
$381
Roundtrip
found 6 days ago
Select United flight, departing Wed, Jul 1 from Denver Intl. to Great Falls Intl., returning Fri, Jul 10, priced at $381 found 6 days ago
Thu, Jul 30 - Mon, Aug 3
DEN
Denver Intl.
GTF
Great Falls Intl.
$383 Roundtrip, found 5 days ago
$383
Roundtrip
found 5 days ago
Select United flight, departing Thu, Jul 30 from Denver Intl. to Great Falls Intl., returning Mon, Aug 3, priced at $383 found 5 days ago
Thu, Sep 3 - Wed, Sep 9
DEN
Denver Intl.
GTF
Great Falls Intl.
$383 Roundtrip, found 2 days ago
$383
Roundtrip
found 2 days ago
Select United flight, departing Thu, Sep 3 from Denver Intl. to Great Falls Intl., returning Wed, Sep 9, priced at $383 found 2 days ago
Fri, Jul 10 - Tue, Jul 14
DEN
Denver Intl.
GTF
Great Falls Intl.
$391 Roundtrip, found 6 days ago
$391
Roundtrip
found 6 days ago
Select United flight, departing Fri, Jul 10 from Denver Intl. to Great Falls Intl., returning Tue, Jul 14, priced at $391 found 6 days ago
Thu, May 21 - Tue, May 26
DEN
Denver Intl.
GTF
Great Falls Intl.
$403 Roundtrip, found 5 days ago
$403
Roundtrip
found 5 days ago
Select United flight, departing Thu, May 21 from Denver Intl. to Great Falls Intl., returning Tue, May 26, priced at $403 found 5 days ago
Thu, Jul 30 - Sun, Aug 2
DEN
Denver Intl.
GTF
Great Falls Intl.
$407 Roundtrip, found 6 days ago
$407
Roundtrip
found 6 days ago
Select United flight, departing Thu, Jul 30 from Denver Intl. to Great Falls Intl., returning Sun, Aug 2, priced at $407 found 6 days ago
Thu, Jul 30 - Sun, Aug 2
DEN
Denver Intl.
GTF
Great Falls Intl.
$408 Roundtrip, found 6 days ago
$408
Roundtrip
found 6 days ago
Select United flight, departing Thu, Jul 30 from Denver Intl. to Great Falls Intl., returning Sun, Aug 2, priced at $408 found 6 days ago
Thu, Jun 4 - Fri, Jun 5
DEN
Denver Intl.
GTF
Great Falls Intl.
$667 Roundtrip, found 4 hours ago
$667
Roundtrip
found 4 hours ago
Select United flight, departing Thu, Jun 4 from Denver Intl. to Great Falls Intl., returning Fri, Jun 5, priced at $667 found 4 hours ago
Thu, Jun 4 - Fri, Jun 5
DEN
Denver Intl.
GTF
Great Falls Intl.
$727 Roundtrip, found 4 hours ago
$727
Roundtrip
found 4 hours ago
Select United flight, departing Thu, Jun 4 from Denver Intl. to Great Falls Intl., returning Fri, Jun 5, priced at $727 found 4 hours ago

Frequently asked questions

What route does flight number UA2100 take?
Flight number UA2100 operates directly from Houston, TX Airport (IAH-George Bush Intercontinental) to Fort Lauderdale - Hollywood Intl. Airport. During this journey, you can expect to be in the air for about 2 hours and 30 minutes. It's wise to book ahead to secure your preferred seat.
What terminal does UA2100 fly out of?
Flights between Houston, TX Airport (IAH-George Bush Intercontinental) and Fort Lauderdale - Hollywood Intl. Airport are served by flight number UA2100, and travelers with a seat booked on this flight usually board from Terminal C.
What kind of plane is on flight number UA2100?
The Boeing 737-900 is the kind of plane most often used for flight UA2100. Typically, this flight heads off from Houston, TX Airport (IAH-George Bush Intercontinental) and touches down at Fort Lauderdale - Hollywood Intl. Airport.
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 UA2100 flight with Travelocity, please visit our Customer Service Portal.