United Flight 5559 Deals & Information (2026/2027)

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United Flight 5559 Route Deals From $135

The cheapest prices found with in the last 7 days for return flights were $263 and $135 for one-way flights to Denver Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jul 14 - Wed, Jul 15
COS
Colorado Springs
DEN
Denver Intl.
$263 Roundtrip, found 5 days ago
$263
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jul 14 from Colorado Springs to Denver Intl., returning Wed, Jul 15, priced at $263 found 5 days ago
Tue, Jun 30 - Wed, Jul 1
COS
Colorado Springs
DEN
Denver Intl.
$269 Roundtrip, found 5 days ago
$269
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jun 30 from Colorado Springs to Denver Intl., returning Wed, Jul 1, priced at $269 found 5 days ago
Tue, Jun 30 - Wed, Jul 1
COS
Colorado Springs
DEN
Denver Intl.
$272 Roundtrip, found 5 days ago
$272
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jun 30 from Colorado Springs to Denver Intl., returning Wed, Jul 1, priced at $272 found 5 days ago
Tue, Jul 14 - Wed, Jul 15
COS
Colorado Springs
DEN
Denver Intl.
$299 Roundtrip, found 5 days ago
$299
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jul 14 from Colorado Springs to Denver Intl., returning Wed, Jul 15, priced at $299 found 5 days ago
Tue, Jun 30 - Wed, Jul 1
COS
Colorado Springs
DEN
Denver Intl.
$308 Roundtrip, found 5 days ago
$308
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jun 30 from Colorado Springs to Denver Intl., returning Wed, Jul 1, priced at $308 found 5 days ago
Tue, Jul 14 - Wed, Jul 15
COS
Colorado Springs
DEN
Denver Intl.
$314 Roundtrip, found 5 days ago
$314
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jul 14 from Colorado Springs to Denver Intl., returning Wed, Jul 15, priced at $314 found 5 days ago
Tue, Jul 14 - Wed, Jul 15
COS
Colorado Springs
DEN
Denver Intl.
$335 Roundtrip, found 5 days ago
$335
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jul 14 from Colorado Springs to Denver Intl., returning Wed, Jul 15, priced at $335 found 5 days ago
Tue, Jun 30 - Wed, Jul 1
COS
Colorado Springs
DEN
Denver Intl.
$340 Roundtrip, found 5 days ago
$340
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jun 30 from Colorado Springs to Denver Intl., returning Wed, Jul 1, priced at $340 found 5 days ago
Fri, Jul 3 - Wed, Jul 8
COS
Colorado Springs
DEN
Denver Intl.
$342 Roundtrip, found 7 hours ago
$342
Roundtrip
found 7 hours ago
Select United flight, departing Fri, Jul 3 from Colorado Springs to Denver Intl., returning Wed, Jul 8, priced at $342 found 7 hours ago
Tue, Jun 30 - Wed, Jul 1
COS
Colorado Springs
DEN
Denver Intl.
$344 Roundtrip, found 5 days ago
$344
Roundtrip
found 5 days ago
Select United flight, departing Tue, Jun 30 from Colorado Springs to Denver Intl., returning Wed, Jul 1, priced at $344 found 5 days ago

Frequently asked questions

What route does flight number UA5559 take?
UA5559 is used on multiple routes, but the most common is between Denver Intl. Airport (DEN) and Sun Valley, ID Airport (SUN-Friedman Memorial). If you're lucky enough to score a direct flight, you'll disembark the plane in approximately 1 hour and 55 minutes. Multi-stop flights can also travel under the same number, as can flights on other routes.
What kind of plane is on flight number UA5559?
It's more than likely you'll be climbing aboard an Embraer 175 if you've reserved a ticket on flight UA5559 from DIA airport to SUN. It's the most commonly used aircraft model on this route.
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 UA5559 flight with Travelocity, please visit our Customer Service Portal.