$26 Cheap flight deals from San Jose (SJC) to Boulder (DEN)

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This Weekend's Flight Deals from San Jose to Boulder

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.

Fri, Sep 19 - Sun, Sep 21
SJC
Norman Y. Mineta San Jose Intl.
DEN
Denver Intl.
$471 Roundtrip, found 5 hours ago
$471
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Fri, Sep 19 from Norman Y. Mineta San Jose Intl. to Denver Intl., returning Sun, Sep 21, priced at $471 found 5 hours ago
Sun, Sep 21 - Mon, Sep 22
OAK
Oakland Intl.
DEN
Denver Intl.
$520 Roundtrip, found 2 days ago
$520
Roundtrip
found 2 days ago
Select Bargain Flight flight, departing Sun, Sep 21 from Oakland Intl. to Denver Intl., returning Mon, Sep 22, priced at $520 found 2 days ago
Sun, Sep 21 - Tue, Oct 7
SFO
San Francisco Intl.
DEN
Denver Intl.
$526 Roundtrip, just found
$526
Roundtrip
just found
Select Alaska Airlines flight, departing Sun, Sep 21 from San Francisco Intl. to Denver Intl., returning Tue, Oct 7, priced at $526 just found

Airfares from $26 One Way, $69 Round Trip from San Jose to Boulder

Prices starting at $69 for return flights and $26 for one-way flights to Boulder were the cheapest prices found within the past 7 days, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Oct 28 - Wed, Oct 29
SFO
San Francisco
DEN
Denver
$69 Roundtrip, found 5 hours ago
$69
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Tue, Oct 28 from San Francisco to Denver, returning Wed, Oct 29, priced at $69 found 5 hours ago
Mon, Nov 17 - Thu, Nov 20
SFO
San Francisco
DEN
Denver
$87 Roundtrip, found 1 day ago
$87
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Mon, Nov 17 from San Francisco to Denver, returning Thu, Nov 20, priced at $87 found 1 day ago
Mon, Oct 20 - Fri, Oct 24
SJC
San Jose
DEN
Denver
$103 Roundtrip, found 3 days ago
$103
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Mon, Oct 20 from San Jose to Denver, returning Fri, Oct 24, priced at $103 found 3 days ago
Sat, Dec 13 - Tue, Dec 16
SFO
San Francisco
DEN
Denver
$133 Roundtrip, found 5 days ago
$133
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Sat, Dec 13 from San Francisco to Denver, returning Tue, Dec 16, priced at $133 found 5 days ago
Sat, Dec 13 - Tue, Dec 16
SFO
San Francisco
DEN
Denver
$133 Roundtrip, found 5 days ago
$133
Roundtrip
found 5 days ago
Select United flight, departing Sat, Dec 13 from San Francisco to Denver, returning Tue, Dec 16, priced at $133 found 5 days ago

Boulder economy flight packages

Price found within the past 48 hours. Click for updated prices.
Sonesta Denver Downtown
4.0-star property

Sonesta Denver Downtown

8.2/10 Very Good! (1,948 reviews)

Oct 25 - Oct 27

2 night stay

San Jose (SJC) to Denver (DEN)

Alaska Airlines • Non-stop • Coach

Denver (DEN) to San Jose (SJC)

Frontier Airlines • Non-stop • Coach
Price was $448, price is now $346 per person
$346
per person
found 1 day ago
Great location. Nice staff. Comfy bed.

Reviewed on Aug 20, 2025

A-Lodge Boulder
3.0-star property

A-Lodge Boulder

8.8/10 Excellent! (1,005 reviews)

Oct 20 - Oct 24

4 night stay

San Jose (SJC) to Denver (DEN)

Frontier Airlines • Roundtrip • Coach
Price was $673, price is now $522 per person
$522
per person
found 11 hours ago
The property’s rustic and cute, tucked away in a canyon. The beds were really comfortable. I enjoyed the sauna. The rooms aren’t that well-maintained (mold in the bathroom). They had a big event with maybe a hundred people and a loud DJ late into the evening (couldn’t drown it out, even in our room). It seems like it’s become a place for community events which is great, but not so great for the guests. Some of the amenities they advertised were out of order. It’s unique and has a lot of potential but wasn’t the place for us, especially at the price (over $300/night).

Reviewed on Aug 20, 2025

Courtyard by Marriott Denver North/Westminster
3.0-star property

Courtyard by Marriott Denver North/Westminster

9.2/10 Wonderful! (1,003 reviews)

Oct 20 - Oct 24

4 night stay

San Jose (SJC) to Denver (DEN)

Frontier Airlines • Roundtrip • Coach
Price was $559, price is now $434 per person
$434
per person
found 11 hours ago
Super clean inside and out with nearby shopping center

Reviewed on Sep 2, 2025

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More About Flying To Boulder from San Jose

Route Information for Flights from San Jose to Boulder

Origin Airport IATA Code
SJC
Destination Airport IATA Code
DEN
Distance
Direct Flight Airlines
Earliest Flight Arrival
Latest Flight Arrival

San Jose to Boulder

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Frequently asked questions

Are there non-stop flights from San Jose to Boulder?
You betcha. As a matter of fact, there are 3 airlines that will fly you directly from San Francisco Airport to Denver Intl. Airport (DEN). Lock in your seat with one of these well-known carriers:

  • United Airlines
  • Southwest Airlines
  • Frontier Airlines

What is the shortest flight from San Jose to Boulder?
It can zip by in as little as 2 hours and 25 minutes. If you believe your vacation hours should be spent 'vacationing' rather than flying, you'll enjoy the flight from San Francisco, CA (SFO-San Francisco Intl.) to DEN.
What airlines fly from San Jose to Boulder most frequently?
Consider booking a ticket with United Airlines (UA), which flies frequently along this route. This airline offers 212 flights every month between San Francisco Airport and DEN. Alternatively, lock in your favorite seat with Southwest Airlines (WN). You'll have 82 monthly flights between San Jose and Boulder to take your pick of with this airline.
What is the cheapest day of the week to fly?
Consider flying out early in the week to save on your airfare. Orbitz data from 2021 shows that Monday is the cheapest day to depart, followed by Tuesday. Saturday showed the highest average ticket prices likely because many travelers prefer to start their vacation on a weekend.
What is the cheapest month to fly?
We won't keep you guessing, according to Orbitz data from 2021, the cheapest month to fly is February. Perfect for those who need a weekend getaway, or just a break from it all in the shortest month of the year. Be aware that the most expensive time to fly is during the height of summer in July, and in the holiday month of December.*According to flight demand on Orbitz.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

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.