United Flight 331 Deals & Information (2025/2026)

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United Flight 331 Route Deals From $224

The cheapest prices found with in the last 7 days for return flights were $209 and $224 for one-way flights to Eastern Iowa for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Dec 24 - Sun, Jan 18
DEN
Denver Intl.
CID
Eastern Iowa
$209 Roundtrip, found 3 days ago
$209
Roundtrip
found 3 days ago
Select United flight, departing Wed, Dec 24 from Denver Intl. to Eastern Iowa, returning Sun, Jan 18, priced at $209 found 3 days ago
Mon, Dec 29 - Mon, Jan 5
DEN
Denver Intl.
CID
Eastern Iowa
$214 Roundtrip, found 1 day ago
$214
Roundtrip
found 1 day ago
Select United flight, departing Mon, Dec 29 from Denver Intl. to Eastern Iowa, returning Mon, Jan 5, priced at $214 found 1 day ago
Fri, Apr 17 - Tue, Apr 21
DEN
Denver Intl.
CID
Eastern Iowa
$219 Roundtrip, found 1 day ago
$219
Roundtrip
found 1 day ago
Select United flight, departing Fri, Apr 17 from Denver Intl. to Eastern Iowa, returning Tue, Apr 21, priced at $219 found 1 day ago
Fri, Jan 16 - Mon, Jan 19
DEN
Denver Intl.
CID
Eastern Iowa
$220 Roundtrip, found 6 days ago
$220
Roundtrip
found 6 days ago
Select United flight, departing Fri, Jan 16 from Denver Intl. to Eastern Iowa, returning Mon, Jan 19, priced at $220 found 6 days ago
Wed, Dec 24 - Sun, Jan 18
DEN
Denver Intl.
CID
Eastern Iowa
$222 Roundtrip, found 3 days ago
$222
Roundtrip
found 3 days ago
Select United flight, departing Wed, Dec 24 from Denver Intl. to Eastern Iowa, returning Sun, Jan 18, priced at $222 found 3 days ago
Thu, Jan 22 - Sun, Jan 25
DEN
Denver Intl.
CID
Eastern Iowa
$232 Roundtrip, found 4 days ago
$232
Roundtrip
found 4 days ago
Select United flight, departing Thu, Jan 22 from Denver Intl. to Eastern Iowa, returning Sun, Jan 25, priced at $232 found 4 days ago
Wed, Dec 24 - Sun, Jan 18
DEN
Denver Intl.
CID
Eastern Iowa
$232 Roundtrip, found 3 days ago
$232
Roundtrip
found 3 days ago
Select United flight, departing Wed, Dec 24 from Denver Intl. to Eastern Iowa, returning Sun, Jan 18, priced at $232 found 3 days ago
Mon, Dec 29 - Mon, Jan 5
DEN
Denver Intl.
CID
Eastern Iowa
$233 Roundtrip, found 1 day ago
$233
Roundtrip
found 1 day ago
Select United flight, departing Mon, Dec 29 from Denver Intl. to Eastern Iowa, returning Mon, Jan 5, priced at $233 found 1 day ago
Mon, Dec 29 - Mon, Jan 5
DEN
Denver Intl.
CID
Eastern Iowa
$235 Roundtrip, found 1 day ago
$235
Roundtrip
found 1 day ago
Select United flight, departing Mon, Dec 29 from Denver Intl. to Eastern Iowa, returning Mon, Jan 5, priced at $235 found 1 day ago
Fri, Apr 17 - Tue, Apr 21
DEN
Denver Intl.
CID
Eastern Iowa
$240 Roundtrip, found 1 day ago
$240
Roundtrip
found 1 day ago
Select United flight, departing Fri, Apr 17 from Denver Intl. to Eastern Iowa, returning Tue, Apr 21, priced at $240 found 1 day ago
Thu, Jan 22 - Sun, Jan 25
DEN
Denver Intl.
CID
Eastern Iowa
$242 Roundtrip, found 4 days ago
$242
Roundtrip
found 4 days ago
Select United flight, departing Thu, Jan 22 from Denver Intl. to Eastern Iowa, returning Sun, Jan 25, priced at $242 found 4 days ago
Thu, Apr 16 - Sat, Apr 18
DEN
Denver Intl.
CID
Eastern Iowa
$248 Roundtrip, found 3 days ago
$248
Roundtrip
found 3 days ago
Select United flight, departing Thu, Apr 16 from Denver Intl. to Eastern Iowa, returning Sat, Apr 18, priced at $248 found 3 days ago
Sun, Dec 28 - Sun, Jan 4
DEN
Denver Intl.
CID
Eastern Iowa
$253 Roundtrip, found 1 day ago
$253
Roundtrip
found 1 day ago
Select United flight, departing Sun, Dec 28 from Denver Intl. to Eastern Iowa, returning Sun, Jan 4, priced at $253 found 1 day ago
Mon, Dec 29 - Sun, Jan 4
DEN
Denver Intl.
CID
Eastern Iowa
$255 Roundtrip, found 1 day ago
$255
Roundtrip
found 1 day ago
Select United flight, departing Mon, Dec 29 from Denver Intl. to Eastern Iowa, returning Sun, Jan 4, priced at $255 found 1 day ago

Frequently asked questions

What route does flight number UA331 take?
UA331 is used on a range of routes. Most commonly, UA331 flies directly from BOI to ORD. If that's your flight path, you'll be up above the clouds for about 3 hours and 20 minutes.
What kind of plane is on flight number UA331?
UA331 is a flight number that's used on a number of routes. If you're booked on the most popular one, Boise Airport to ORD, there's a strong chance you'll be on an Airbus A319.
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 UA331 flight with Travelocity, please visit our Customer Service Portal.