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Cheap flights from Illinois to Helena from $269

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 Helena departing on 11/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Illinois to Helena

Cheap round-trip flights

Alaska Airlines Logo
8:00 am - 5:36 pmORD-HLN
10h 36m1 stop
Alaska Airlines Logo
6:13 pm - 12:24 amHLN-ORD
29h 11m1 stop
$374Alaska Airlines
Find Deal
qua, out 29 - sex, out 31
United Airlines Logo
8:47 am - 1:27 pmORD-HLN
5h 40m1 stop
United Airlines Logo
2:22 pm - 8:58 pmHLN-ORD
5h 36m1 stop
$381United Airlines
Find Deal
qua, out 29 - sex, out 31
Alaska Airlines Logo
8:00 am - 5:36 pmORD-HLN
10h 36m1 stop
Alaska Airlines Logo
6:13 pm - 6:00 amHLN-ORD
34h 47m2 stops
$390Alaska Airlines
Find Deal
qua, out 29 - sex, out 31
Delta Logo
10:35 am - 10:38 pmMDW-HLN
13h 03m2 stops
Delta Logo
5:35 am - 6:08 pmHLN-MDW
11h 33m2 stops
$391Delta
Find Deal
qua, jan 14 - dom, jan 18
Alaska Airlines Logo
6:33 am - 5:41 pmSTL-HLN
12h 08m1 stop
Alaska Airlines Logo
6:13 pm - 3:18 pmHLN-STL
20h 05m1 stop
$405Alaska Airlines
Find Deal
sáb, out 25 - sex, out 31
Delta Logo
7:20 am - 12:26 pmORD-HLN
6h 06m1 stop
Delta Logo
5:30 am - 12:41 pmHLN-ORD
6h 11m1 stop
$409Delta
Find Deal
dom, dez 14 - qua, dez 17
United Airlines Logo
10:48 am - 9:00 pmPIA-HLN
11h 12m2 stops
United Airlines Logo
2:42 pm - 9:05 pmHLN-PIA
5h 23m1 stop
$414United Airlines
Find Deal
ter, out 7 - sáb, out 11
Alaska Airlines Logo
7:59 pm - 5:36 pmORD-HLN
22h 37m2 stops
Alaska Airlines Logo
6:13 pm - 6:00 amHLN-ORD
34h 47m2 stops
$430Alaska Airlines
Find Deal
qua, out 29 - sex, out 31
Alaska Airlines Logo
3:25 pm - 5:36 pmORD-HLN
27h 11m1 stop
Alaska Airlines Logo
6:13 pm - 1:09 pmHLN-ORD
17h 56m2 stops
$439Alaska Airlines
Find Deal
sex, out 31 - ter, nov 4
Hawaiian Airlines Logo
3:15 pm - 5:41 pmORD-HLN
27h 26m1 stop
Hawaiian Airlines Logo
6:18 pm - 5:03 pmHLN-ORD
21h 45m1 stop
$443Hawaiian Airlines
Find Deal
sáb, out 11 - seg, out 20

Delta flights from Illinois to Helena

Our best Delta deals on Illinois to Helena flight tickets
Delta
Jan 14
MDW10:35 amChicago Midway
13h 03m
2 stops
HLN10:38 pmHelena
Jan 18
HLN5:35 amHelena
11h 33m
2 stops
MDW6:08 pmChicago Midway
$391
Find similar
Delta
Dec 14
ORD7:20 amChicago O'Hare Intl
6h 06m
1 stop
HLN12:26 pmHelena
Dec 17
HLN5:30 amHelena
6h 11m
1 stop
ORD12:41 pmChicago O'Hare Intl
$409
Find similar
Delta
Oct 11
ORD7:37 amChicago O'Hare Intl
29h 43m
2 stops
HLN12:20 pmHelena
Oct 20
HLN1:00 pmHelena
7h 43m
1 stop
ORD9:43 pmChicago O'Hare Intl
$446
Find similar

Alaska Airlines flights from Illinois to Helena

Our best Alaska Airlines deals on Illinois to Helena flight tickets
Alaska Airlines
Oct 29
ORD8:00 amChicago O'Hare Intl
10h 36m
1 stop
HLN5:36 pmHelena
Oct 31
HLN6:13 pmHelena
29h 11m
1 stop
ORD12:24 amChicago O'Hare Intl
$374
Find similar
Alaska Airlines
Oct 29
ORD8:00 amChicago O'Hare Intl
10h 36m
1 stop
HLN5:36 pmHelena
Oct 31
HLN6:13 pmHelena
34h 47m
2 stops
ORD6:00 amChicago O'Hare Intl
$390
Find similar
Alaska Airlines
Oct 25
STL6:33 amLambert-St Louis
12h 08m
1 stop
HLN5:41 pmHelena
Oct 31
HLN6:13 pmHelena
20h 05m
1 stop
STL3:18 pmLambert-St Louis
$405
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Helena 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 setembro 23, 2025.
Use the filters below to find and compare flights from Illinois to Helena that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

qua 10/29

8:00 am-5:36 pm

1 stop10h 36m

Helena

sex 10/31

6:13 pm-12:24 am

1 stop29h 11m

$374

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

qua 10/29

8:47 am-1:27 pm

1 stop5h 40m

Helena

sex 10/31

2:22 pm-8:58 pm

1 stop5h 36m

$381

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

qua 10/29

8:00 am-5:36 pm

1 stop10h 36m

Helena

sex 10/31

6:13 pm-6:00 am

2 stops34h 47m

$390

ChicagoHelena

MDW - HLN

MDWHLN

Chicago Midway

qua 1/14

10:35 am-10:38 pm

2 stops13h 03m

Helena

dom 1/18

5:35 am-6:08 pm

2 stops11h 33m

$391

St. LouisHelena

STL - HLN

STLHLN

Lambert-St Louis

sáb 10/25

6:33 am-5:41 pm

1 stop12h 08m

Helena

sex 10/31

6:13 pm-3:18 pm

1 stop20h 05m

$405

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

dom 12/14

7:20 am-12:26 pm

1 stop6h 06m

Helena

qua 12/17

5:30 am-12:41 pm

1 stop6h 11m

$409

PeoriaHelena

PIA - HLN

PIAHLN

Greater Peoria

ter 10/7

10:48 am-9:00 pm

2 stops11h 12m

Helena

sáb 10/11

2:42 pm-9:05 pm

1 stop5h 23m

$414

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

qua 10/29

7:59 pm-5:36 pm

2 stops22h 37m

Helena

sex 10/31

6:13 pm-6:00 am

2 stops34h 47m

$430

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

sex 10/31

3:25 pm-5:36 pm

1 stop27h 11m

Helena

ter 11/4

6:13 pm-1:09 pm

2 stops17h 56m

$439

ChicagoHelena

ORD - HLN

ORDHLN

Chicago O'Hare Intl

sáb 10/11

3:15 pm-5:41 pm

1 stop27h 26m

Helena

seg 10/20

6:18 pm-5:03 pm

1 stop21h 45m

$443

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 Helena from

How to get the cheapest flight ticket from Illinois to Helena

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 day to depart on your flight to Helena?

The cheapest day to depart from Illinois to Helena is on a Wednesday. Travelers who choose to depart for Helena on a Wednesday will often find tickets for as low as $477. The most expensive day to fly to Helena is Monday, with ticket prices averaging around $1,040.

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

According to our data, the cheapest time of day to fly to Helena is in the morning. momondo users have found flights departing from Illinois to Helena in the morning for as low as $557. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Helena is in the afternoon when prices are around $863.

Cheap Illinois to Helena flight deals and tips

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

Direct flights

None
There are no direct flights from Illinois to Helena. There are no popular flight routes from Illinois to Helena.
Search flight deals

  • When did momondo last update prices for flights from Illinois to Helena Airport?

    Prices for flights from Illinois to Helena Airport were last updated today.

  • How many operators does momondo search for flights from Illinois to Helena Airport?

  • How old do you have to be to fly from Illinois to Helena 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 Helena Airport.

  • What documentation or ID do you need to fly to Helena Airport?

    The travel and health documents required for your trip to Helena Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Helena Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Illinois to Helena

Compare and see reviews for airlines that fly from Illinois to Helena with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $298Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Illinois to Helena. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for Illinois to Helena flights to just show those with flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Helena from Illinois.

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

Yes. momondo can track prices for Illinois to Helena flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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1 adult
qui 10/23
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