United Flight 720 Deals & Information (2026/2027)

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United Flight 720 Route Deals From $170

The cheapest prices found with in the last 7 days for return flights were $280 and $170 for one-way flights to Calgary Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Jun 1 - Sat, Jun 6
DEN
Denver Intl.
YYC
Calgary Intl.
$280 Roundtrip, found 4 days ago
$280
Roundtrip
found 4 days ago
Select United flight, departing Mon, Jun 1 from Denver Intl. to Calgary Intl., returning Sat, Jun 6, priced at $280 found 4 days ago
Mon, Jun 1 - Sat, Jun 6
DEN
Denver Intl.
YYC
Calgary Intl.
$298 Roundtrip, found 4 days ago
$298
Roundtrip
found 4 days ago
Select United flight, departing Mon, Jun 1 from Denver Intl. to Calgary Intl., returning Sat, Jun 6, priced at $298 found 4 days ago
Sun, May 31 - Mon, Jun 1
DEN
Denver Intl.
YYC
Calgary Intl.
$372 Roundtrip, found 5 days ago
$372
Roundtrip
found 5 days ago
Select United flight, departing Sun, May 31 from Denver Intl. to Calgary Intl., returning Mon, Jun 1, priced at $372 found 5 days ago
Fri, May 29 - Sat, Jun 6
DEN
Denver Intl.
YYC
Calgary Intl.
$374 Roundtrip, found 1 day ago
$374
Roundtrip
found 1 day ago
Select United flight, departing Fri, May 29 from Denver Intl. to Calgary Intl., returning Sat, Jun 6, priced at $374 found 1 day ago
Fri, Aug 7 - Sun, Aug 16
DEN
Denver Intl.
YYC
Calgary Intl.
$410 Roundtrip, just found
$410
Roundtrip
just found
Select United flight, departing Fri, Aug 7 from Denver Intl. to Calgary Intl., returning Sun, Aug 16, priced at $410 just found

Frequently asked questions

What route does flight number UA720 take?
You'll be landing at DIA airport from San Francisco, CA Airport (SFO-San Francisco Intl.) if you're traveling on flight number UA720. You'll be airborne for 2 hours and 35 minutes on this trip. What's more, the flight conveniently operates non-stop.
What terminal does UA720 fly out of?
You'll likely be departing from Terminal 3 if you're traveling on flight number UA720 direct from San Francisco Intl. Airport (SFO) to DEN.
What kind of plane is on flight number UA720?
The Boeing 737-800 is the kind of plane that's mostly used for flight number UA720. Typically, this flight takes off from SFO and comes in to land at DIA 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 UA720 flight with Travelocity, please visit our Customer Service Portal.