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Cheap flights from Illinois to Aspen from $139

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Aspen departing on 3/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Illinois to Aspen

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:00 am - 12:12 pm
STL
-
ASE
7h 12m1 stop
United Airlines Logo
7:15 am - 3:39 pm
ASE
-
STL
7h 24m1 stop
$299United Airlines
Tue, Jan 20 - Sat, Jan 24
United Airlines Logo
4:15 pm - 9:59 pm
STL
-
ASE
6h 44m1 stop
United Airlines Logo
7:35 am - 7:27 pm
ASE
-
STL
10h 52m2 stops
$304United Airlines
Tue, Jan 20 - Sat, Jan 24
United Airlines Logo
9:00 am - 11:41 am
ORD
-
ASE
3h 41mnonstop
United Airlines Logo
4:20 pm - 8:20 pm
ASE
-
ORD
3h 00mnonstop
$307United Airlines
Tue, Mar 17 - Wed, Mar 18
American Airlines Logo
7:15 am - 9:44 am
ORD
-
ASE
3h 29mnonstop
American Airlines Logo
3:46 pm - 7:51 pm
ASE
-
ORD
3h 05mnonstop
$308American Airlines
Mon, Mar 23 - Mon, Mar 30
United Airlines Logo
11:20 am - 6:39 pm
STL
-
ASE
8h 19m2 stops
United Airlines Logo
12:36 pm - 9:13 pm
ASE
-
STL
7h 37m2 stops
$309United Airlines
Tue, Jan 20 - Sat, Jan 24
American Airlines Logo
11:40 am - 2:18 pm
ORD
-
ASE
3h 38mnonstop
American Airlines Logo
12:54 pm - 4:55 pm
ASE
-
ORD
3h 01mnonstop
$311American Airlines
Sun, Feb 1 - Fri, Feb 6
American Airlines Logo
10:00 am - 12:38 pm
ORD
-
ASE
3h 38mnonstop
American Airlines Logo
12:54 pm - 4:55 pm
ASE
-
ORD
3h 01mnonstop
$312American Airlines
Sun, Jan 18 - Tue, Jan 27
Delta Logo
6:00 am - 2:14 pm
MDW
-
ASE
9h 14m1 stop
Delta Logo
3:00 pm - 10:31 pm
ASE
-
MDW
6h 31m1 stop
$341Delta
Sun, Feb 22 - Fri, Feb 27
Delta Logo
6:00 am - 2:14 pm
MDW
-
ASE
9h 14m1 stop
Delta Logo
3:00 pm - 10:31 pm
ASE
-
MDW
6h 31m1 stop
$395Delta
Sun, Feb 22 - Fri, Feb 27
Delta Logo
6:00 am - 11:43 am
MDW
-
ASE
6h 43m1 stop
Delta Logo
3:00 pm - 10:33 pm
ASE
-
MDW
6h 33m1 stop
$586Delta
Tue, Feb 10 - Tue, Feb 24

Delta flights from Illinois to Aspen

Our best Delta deals on Illinois to Aspen flight tickets
Delta
Feb 22
MDW6:00 amChicago Midway
9h 14m
1 stop
ASE2:14 pmAspen Pitkin County
Feb 27
ASE3:00 pmAspen Pitkin County
6h 31m
1 stop
MDW10:31 pmChicago Midway
$341
Find similar
Delta
Feb 22
MDW6:00 amChicago Midway
9h 14m
1 stop
ASE2:14 pmAspen Pitkin County
Feb 27
ASE3:00 pmAspen Pitkin County
6h 31m
1 stop
MDW10:31 pmChicago Midway
$395
Find similar
Delta
Jan 11
ORD5:30 amChicago O'Hare Intl
9h 46m
1 stop
ASE2:16 pmAspen Pitkin County
Jan 15
ASE3:04 pmAspen Pitkin County
7h 55m
1 stop
ORD11:59 pmChicago O'Hare Intl
$451
Find similar

United Airlines flights from Illinois to Aspen

Our best United Airlines deals on Illinois to Aspen flight tickets
United Airlines
Jan 26
STL9:57 amLambert-St Louis
7h 55m
2 stops
ASE4:52 pmAspen Pitkin County
Feb 2
ASE12:36 pmAspen Pitkin County
7h 22m
1 stop
STL8:58 pmLambert-St Louis
$284
Find similar
United Airlines
Jan 20
STL6:00 amLambert-St Louis
7h 12m
1 stop
ASE12:12 pmAspen Pitkin County
Jan 24
ASE7:15 amAspen Pitkin County
7h 24m
1 stop
STL3:39 pmLambert-St Louis
$299
Find similar
United Airlines
Jan 20
STL4:15 pmLambert-St Louis
6h 44m
1 stop
ASE9:59 pmAspen Pitkin County
Jan 24
ASE7:35 amAspen Pitkin County
10h 52m
2 stops
STL7:27 pmLambert-St Louis
$304
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Aspen that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated December 27, 2025.
Use the filters below to find and compare flights from Illinois to Aspen that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Tue 1/20

6:00 am-12:12 pm

1 stop7h 12m

Aspen Pitkin County

Sat 1/24

7:15 am-3:39 pm

1 stop7h 24m

$299

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Tue 1/20

4:15 pm-9:59 pm

1 stop6h 44m

Aspen Pitkin County

Sat 1/24

7:35 am-7:27 pm

2 stops10h 52m

$304

ChicagoAspen

ORD - ASE

ORDASE

Chicago O'Hare Intl

Tue 3/17

9:00 am-11:41 am

Nonstop3h 41m

Aspen Pitkin County

Wed 3/18

4:20 pm-8:20 pm

Nonstop3h 00m

$307

ChicagoAspen

ORD - ASE

ORDASE

Chicago O'Hare Intl

Mon 3/23

7:15 am-9:44 am

Nonstop3h 29m

Aspen Pitkin County

Mon 3/30

3:46 pm-7:51 pm

Nonstop3h 05m

$308

St. LouisAspen

STL - ASE

STLASE

Lambert-St Louis

Tue 1/20

11:20 am-6:39 pm

2 stops8h 19m

Aspen Pitkin County

Sat 1/24

12:36 pm-9:13 pm

2 stops7h 37m

$309

ChicagoAspen

ORD - ASE

ORDASE

Chicago O'Hare Intl

Sun 2/1

11:40 am-2:18 pm

Nonstop3h 38m

Aspen Pitkin County

Fri 2/6

12:54 pm-4:55 pm

Nonstop3h 01m

$311

ChicagoAspen

ORD - ASE

ORDASE

Chicago O'Hare Intl

Sun 1/18

10:00 am-12:38 pm

Nonstop3h 38m

Aspen Pitkin County

Tue 1/27

12:54 pm-4:55 pm

Nonstop3h 01m

$312

ChicagoAspen

MDW - ASE

MDWASE

Chicago Midway

Sun 2/22

6:00 am-2:14 pm

1 stop9h 14m

Aspen Pitkin County

Fri 2/27

3:00 pm-10:31 pm

1 stop6h 31m

$341

ChicagoAspen

MDW - ASE

MDWASE

Chicago Midway

Sun 2/22

6:00 am-2:14 pm

1 stop9h 14m

Aspen Pitkin County

Fri 2/27

3:00 pm-10:31 pm

1 stop6h 31m

$395

ChicagoAspen

MDW - ASE

MDWASE

Chicago Midway

Tue 2/10

6:00 am-11:43 am

1 stop6h 43m

Aspen Pitkin County

Tue 2/24

3:00 pm-10:33 pm

1 stop6h 33m

$586

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Aspen from

How to get the cheapest flight ticket from Illinois to Aspen

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Aspen?

The month of September is, on average, the cheapest month to fly to Aspen from Illinois, with most prices found around $382. If you aren’t able to travel to Aspen during the month of September, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $448.

What is the cheapest day to depart on your flight to Aspen?

The cheapest day to depart from Illinois to Aspen is on a Tuesday when prices can be found for as low as $365. The most expensive day to fly to Aspen is Thursday, with ticket prices averaging around $632.

What is the cheapest time of day to depart on your flight to Aspen?

In the morning is the cheapest time of day to fly from Illinois to Aspen when you can find flight prices for as low as $500. Flying to Aspen in the morning is an ideal time because this is during off-peak travel hours. Try not to purchase tickets at noon because they tend to be around $640. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Illinois to Aspen Pitkin County flight route?

Fly from Chicago O'Hare Intl to Aspen Pitkin County for the best Illinois - Aspen Pitkin County flight prices

How far in advance should I book a flight to Aspen?

You are more likely to see cheaper flights to Aspen from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Aspen for around $487 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Aspen from Illinois for as low as $354 on momondo.

What cabin class options are available on Illinois to Aspen Pitkin County flights?

There are 4 cabin classes available to choose from on Illinois to Aspen Pitkin County flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap Illinois to Aspen flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Aspen

Best Price Found

$320

Fastest flight time

3h 19m

Direct flights

Every day

Airports in Aspen

1 airport
The best one-way flight to Aspen from Illinois in the past 72 hours is $320. The best round-trip flight deal from Illinois to Aspen found on momondo in the last 72 hours is $405.
The fastest flight from Illinois to Aspen takes 3h 19m
Direct flights go from Illinois to Aspen every day.
There is 1 airport in Aspen. From Illinois there are direct flights to Aspen Pitkin County (ASE).
Search flight deals

  • When did momondo last update prices for flights from Illinois to Aspen Pitkin County Airport?

    Prices for flights from Illinois to Aspen Pitkin County Airport refresh daily.

  • How many operators does momondo search for flights from Illinois to Aspen Pitkin County Airport?

  • How old do you have to be to fly from Illinois to Aspen Pitkin County Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to Aspen Pitkin County Airport.

  • What documentation or ID do you need to fly to Aspen Pitkin County Airport?

    The required travel and health documents for your Aspen Pitkin County Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Aspen Pitkin County Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Illinois to Aspen?

Best airlines flying from Illinois to Aspen

Compare and see reviews for airlines that fly from Illinois to Aspen with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $239Free CancellationRating
7.2
11,073 reviews
Search American Airlines flights
United AirlinesPriceFrom $299Free CancellationRating
7.4
9,113 reviews
Search United Airlines flights

Traveling to a place near Aspen?

Book flights to Aspen if you plan to visit one of these locations
Snowmass Village
Leadville
Snowmass
Carbondale
Buena Vista

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Aspen?

Finding the right flight to Aspen from Illinois is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Aspen quick and easy, saving you time and money.

Can I find flights from Illinois to Aspen with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Aspen from Illinois with this policy.

How can momondo help me find flights from Illinois to Aspen?

momondo helps you find the best flight between Illinois and Aspen by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Illinois to Aspen right now. Can momondo alert me if prices change?

Price alerts on flights to Aspen from Illinois are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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