United Flight 5559 Deals & Information (2026/2027)

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United Flight 5559 Route Deals From $259

The cheapest prices found with in the last 7 days for return flights were $209 and $259 for one-way flights to Denver Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, May 12 - Sat, May 16
BIS
Bismarck Municipal
DEN
Denver Intl.
$209 Roundtrip, found 5 days ago
$209
Roundtrip
found 5 days ago
Select United flight, departing Tue, May 12 from Bismarck Municipal to Denver Intl., returning Sat, May 16, priced at $209 found 5 days ago
Sat, Aug 15 - Tue, Aug 18
BIS
Bismarck Municipal
DEN
Denver Intl.
$232 Roundtrip, found 5 hours ago
$232
Roundtrip
found 5 hours ago
Select United flight, departing Sat, Aug 15 from Bismarck Municipal to Denver Intl., returning Tue, Aug 18, priced at $232 found 5 hours ago
Tue, May 12 - Sat, May 16
BIS
Bismarck Municipal
DEN
Denver Intl.
$248 Roundtrip, found 5 days ago
$248
Roundtrip
found 5 days ago
Select United flight, departing Tue, May 12 from Bismarck Municipal to Denver Intl., returning Sat, May 16, priced at $248 found 5 days ago
Thu, Mar 26 - Sun, Mar 29
BIS
Bismarck Municipal
DEN
Denver Intl.
$257 Roundtrip, found 5 days ago
$257
Roundtrip
found 5 days ago
Select United flight, departing Thu, Mar 26 from Bismarck Municipal to Denver Intl., returning Sun, Mar 29, priced at $257 found 5 days ago
Fri, Apr 10 - Sun, Apr 12
BIS
Bismarck Municipal
DEN
Denver Intl.
$261 Roundtrip, found 15 hours ago
$261
Roundtrip
found 15 hours ago
Select United flight, departing Fri, Apr 10 from Bismarck Municipal to Denver Intl., returning Sun, Apr 12, priced at $261 found 15 hours ago
Sat, Aug 15 - Tue, Aug 18
BIS
Bismarck Municipal
DEN
Denver Intl.
$262 Roundtrip, found 5 hours ago
$262
Roundtrip
found 5 hours ago
Select United flight, departing Sat, Aug 15 from Bismarck Municipal to Denver Intl., returning Tue, Aug 18, priced at $262 found 5 hours ago
Sat, Aug 15 - Tue, Aug 18
BIS
Bismarck Municipal
DEN
Denver Intl.
$272 Roundtrip, found 5 hours ago
$272
Roundtrip
found 5 hours ago
Select United flight, departing Sat, Aug 15 from Bismarck Municipal to Denver Intl., returning Tue, Aug 18, priced at $272 found 5 hours ago
Tue, May 12 - Sat, May 16
BIS
Bismarck Municipal
DEN
Denver Intl.
$278 Roundtrip, found 5 days ago
$278
Roundtrip
found 5 days ago
Select United flight, departing Tue, May 12 from Bismarck Municipal to Denver Intl., returning Sat, May 16, priced at $278 found 5 days ago
Tue, May 12 - Sat, May 16
BIS
Bismarck Municipal
DEN
Denver Intl.
$279 Roundtrip, found 5 days ago
$279
Roundtrip
found 5 days ago
Select United flight, departing Tue, May 12 from Bismarck Municipal to Denver Intl., returning Sat, May 16, priced at $279 found 5 days ago
Sat, Aug 15 - Tue, Aug 18
BIS
Bismarck Municipal
DEN
Denver Intl.
$285 Roundtrip, found 5 hours ago
$285
Roundtrip
found 5 hours ago
Select United flight, departing Sat, Aug 15 from Bismarck Municipal to Denver Intl., returning Tue, Aug 18, priced at $285 found 5 hours 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.