$53 Cheap flight deals from San Francisco (SJC) to Keystone (DEN)

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This Weekend's Flight Deals from San Francisco to Keystone

This weekend's flight prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Oct 5 - Tue, Oct 7
SFO
San Francisco Intl.
DEN
Denver Intl.
$206 Roundtrip, just found
$206
Roundtrip
just found
Select Frontier Airlines flight, departing Sun, Oct 5 from San Francisco Intl. to Denver Intl., returning Tue, Oct 7, priced at $206 just found
Fri, Oct 3 - Mon, Oct 6
SJC
Norman Y. Mineta San Jose Intl.
DEN
Denver Intl.
$325 Roundtrip, just found
$325
Roundtrip
just found
Select Frontier Airlines flight, departing Fri, Oct 3 from Norman Y. Mineta San Jose Intl. to Denver Intl., returning Mon, Oct 6, priced at $325 just found
Sat, Oct 4 - Mon, Oct 6
OAK
Oakland Intl.
DEN
Denver Intl.
$678 Roundtrip, found 3 hours ago
$678
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Sat, Oct 4 from Oakland Intl. to Denver Intl., returning Mon, Oct 6, priced at $678 found 3 hours ago

Airfares from $53 One Way, $108 Round Trip from San Francisco to Keystone

Prices starting at $108 for return flights and $53 for one-way flights to Keystone were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Oct 29 - Thu, Oct 30
SFO
San Francisco
DEN
Denver
$108 Roundtrip, found 15 hours ago
$108
Roundtrip
found 15 hours ago
Select Frontier Airlines flight, departing Wed, Oct 29 from San Francisco to Denver, returning Thu, Oct 30, priced at $108 found 15 hours ago
Mon, Oct 27 - Fri, Oct 31
SJC
San Jose
DEN
Denver
$130 Roundtrip, found 21 hours ago
$130
Roundtrip
found 21 hours ago
Select Frontier Airlines flight, departing Mon, Oct 27 from San Jose to Denver, returning Fri, Oct 31, priced at $130 found 21 hours ago
Wed, Oct 29 - Wed, Nov 5
SFO
San Francisco
DEN
Denver
$160 Roundtrip, found 18 hours ago
$160
Roundtrip
found 18 hours ago
Select Southwest Airlines flight, departing Wed, Oct 29 from San Francisco to Denver, returning Wed, Nov 5, priced at $160 found 18 hours ago
Tue, Oct 28 - Tue, Nov 4
SJC
San Jose
DEN
Denver
$165 Roundtrip, found 5 days ago
$165
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue, Oct 28 from San Jose to Denver, returning Tue, Nov 4, priced at $165 found 5 days ago
Thu, Oct 30 - Sat, Nov 1
OAK
Oakland
DEN
Denver
$180 Roundtrip, found 2 days ago
$180
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Thu, Oct 30 from Oakland to Denver, returning Sat, Nov 1, priced at $180 found 2 days ago

Keystone economy flight packages

Price found within the past 48 hours. Click for updated prices.
The Source Hotel
4.5-star property

The Source Hotel

8.8/10 Excellent! (1,002 reviews)

Nov 5 - Nov 8

3 night stay

San Francisco (SFO) to Denver (DEN)

Frontier Airlines • Roundtrip • Coach
Save 100% on your flight
Price was $455, price is now $295 per person
$295
per person
found 17 hours ago
Great stay! Very friendly and accommodating staff. Attractive aesthetic, wonderful dining, convenient location.

Reviewed on Sep 24, 2025

The Slate Denver, Tapestry Collection By Hilton
4.0-star property

The Slate Denver, Tapestry Collection By Hilton

9.4/10 Exceptional! (1,454 reviews)

Nov 5 - Nov 8

3 night stay

San Francisco (SFO) to Denver (DEN)

Frontier Airlines • Roundtrip • Coach
Save 100% on your flight
Price was $609, price is now $420 per person
$420
per person
found 17 hours ago
We loved the hotel, the room, the bar area, and the location. The check-in crew were excellent and so was the staff serving breakfast. The bar area was great and so was the bartender. We will definitely stay here again!

Reviewed on Aug 21, 2025

Hilton Garden Inn Denver Union Station, CO
3.5-star property

Hilton Garden Inn Denver Union Station, CO

9/10 Wonderful! (1,919 reviews)

Nov 5 - Nov 8

3 night stay

San Francisco (SFO) to Denver (DEN)

Frontier Airlines • Roundtrip • Coach
Save 100% on your flight
Price was $615, price is now $432 per person
$432
per person
found 17 hours ago
My only recommendation is how the hotel handles Government Tax Exempt. I provided my tax exempt form and also provided the paper work the hotel asked to have completed and at the time of checkout the tax exempt had not been applied to the two rooms I had paid for. The requested documents were provided to the hotel staff the following morning upon check-in. I was their for 3 days.;

Reviewed on Sep 18, 2025

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More About Flying To Keystone from San Francisco

Route Information for Flights from San Francisco to Keystone

Origin Airport IATA Code
SJC
Destination Airport IATA Code
DEN
Distance
965 mi
Direct Flight Airlines
Air Canada, Frontier Airlines, Avianca, Emirates, Southwest Airlines, ANA, Asiana Airlines, Virgin Australia, Air New Zealand, United Airlines
Earliest Flight Arrival
3:30PM UTC
Latest Flight Arrival
7:29AM UTC

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Fare, taxes & fees: Fares include all taxes and fees, except baggage fees. Rates shown reflect fares found by other Orbitz users over the past 7 days. Due to rapidly changing airline prices & seat availability, these fares may no longer be available.

Refunds/changes/cancellations: Itinerary changes, if permitted for the fare, will have a $30 service fee charged by Orbitz. Additional airline charges may apply.

Other conditions: Schedules, fares and rules are subject to change without notice. Seats are limited and may not be available on all flights/dates or in all markets. Lower fares may be available. Fares will not be honored retroactively or in exchange for any wholly/partially unused ticket. Tickets are non-transferable and non-refundable. Fare rules are provided for the selected itinerary before booking.