United Flight WN5399 Deals & Information (2025/2026)

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United Flight 5399 Route Deals From $50

The cheapest prices found with in the last 7 days for return flights were $97 and $50 for one-way flights to Denver Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Oct 9 - Wed, Oct 15
COS
Colorado Springs
DEN
Denver Intl.
$97 Roundtrip, found 5 days ago
$97
Roundtrip
found 5 days ago
Select United flight, departing Thu, Oct 9 from Colorado Springs to Denver Intl., returning Wed, Oct 15, priced at $97 found 5 days ago
Sat, Aug 23 - Mon, Aug 25
COS
Colorado Springs
DEN
Denver Intl.
$101 Roundtrip, found 5 days ago
$101
Roundtrip
found 5 days ago
Select United flight, departing Sat, Aug 23 from Colorado Springs to Denver Intl., returning Mon, Aug 25, priced at $101 found 5 days ago
Thu, Oct 9 - Wed, Oct 15
COS
Colorado Springs
DEN
Denver Intl.
$119 Roundtrip, found 5 days ago
$119
Roundtrip
found 5 days ago
Select United flight, departing Thu, Oct 9 from Colorado Springs to Denver Intl., returning Wed, Oct 15, priced at $119 found 5 days ago
Sat, Aug 23 - Mon, Aug 25
COS
Colorado Springs
DEN
Denver Intl.
$121 Roundtrip, found 5 days ago
$121
Roundtrip
found 5 days ago
Select United flight, departing Sat, Aug 23 from Colorado Springs to Denver Intl., returning Mon, Aug 25, priced at $121 found 5 days ago
Sat, Aug 30 - Fri, Sep 5
COS
Colorado Springs
DEN
Denver Intl.
$123 Roundtrip, found 4 days ago
$123
Roundtrip
found 4 days ago
Select United flight, departing Sat, Aug 30 from Colorado Springs to Denver Intl., returning Fri, Sep 5, priced at $123 found 4 days ago
Sat, Aug 23 - Mon, Aug 25
COS
Colorado Springs
DEN
Denver Intl.
$131 Roundtrip, found 5 days ago
$131
Roundtrip
found 5 days ago
Select United flight, departing Sat, Aug 23 from Colorado Springs to Denver Intl., returning Mon, Aug 25, priced at $131 found 5 days ago
Sat, Aug 23 - Mon, Aug 25
COS
Colorado Springs
DEN
Denver Intl.
$140 Roundtrip, found 5 days ago
$140
Roundtrip
found 5 days ago
Select United flight, departing Sat, Aug 23 from Colorado Springs to Denver Intl., returning Mon, Aug 25, priced at $140 found 5 days ago
Thu, Oct 9 - Wed, Oct 15
COS
Colorado Springs
DEN
Denver Intl.
$141 Roundtrip, found 5 days ago
$141
Roundtrip
found 5 days ago
Select United flight, departing Thu, Oct 9 from Colorado Springs to Denver Intl., returning Wed, Oct 15, priced at $141 found 5 days ago
Sat, Aug 30 - Fri, Sep 5
COS
Colorado Springs
DEN
Denver Intl.
$144 Roundtrip, found 4 days ago
$144
Roundtrip
found 4 days ago
Select United flight, departing Sat, Aug 30 from Colorado Springs to Denver Intl., returning Fri, Sep 5, priced at $144 found 4 days ago
Sat, Aug 30 - Fri, Sep 5
COS
Colorado Springs
DEN
Denver Intl.
$147 Roundtrip, found 4 days ago
$147
Roundtrip
found 4 days ago
Select United flight, departing Sat, Aug 30 from Colorado Springs to Denver Intl., returning Fri, Sep 5, priced at $147 found 4 days ago

Frequently asked questions

What route does flight number UA5399 take?
UA5399 is used on multiple routes, but the most common is between O'Hare Airport and Boise Airport. If you manage to score a direct flight, you'll disembark the plane in about 3 hours and 50 minutes. Multi-stop flights can also operate under this number, as can services on other routes.
What terminal does UA5399 fly out of?
UA5399 flights from Chicago, IL Airport (ORD-O'Hare Intl.) typically depart from Terminal 2. This flight number runs on several different routes, but the most popular one is Chicago, IL Airport (ORD-O'Hare Intl.) to Boise Airport.
What kind of plane is on flight number UA5399?
It's likely you'll be traveling aboard the Embraer 175 if you've reserved a seat on flight number UA5399 from Chicago, IL Airport (ORD-O'Hare Intl.) to Boise Airport (BOI). It's the most commonly used type of plane on this particular 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 UA5399 flight with Travelocity, please visit our Customer Service Portal.