$167+ Cheap flights from Santa Rosa (STS) to Illinois
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/24. Fares are subject to change and may not be available on all flights or dates of travel.
STS — ORD
Mar 1 — Mar 81
1 adult, Economy
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Find cheap flights from Santa Rosa to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from Santa Rosa to IllinoisExplore the most affordable flight options available from Santa Rosa to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 30, 2026.
Explore the most affordable flight options available from Santa Rosa to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 30, 2026.
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/246:53 pm
STS
- ORD
1 stop9h 46m
Alaska Airlines
Wed 4/14:13 pm
ORD
- STS
1 stop9h 00m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$247
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/246:53 pm
STS
- ORD
1 stop9h 46m
Alaska Airlines
Tue 3/318:20 am
ORD
- STS
1 stop16h 53m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$270
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/306:53 pm
STS
- ORD
1 stop9h 46m
Alaska Airlines
Wed 4/14:13 pm
ORD
- STS
1 stop9h 00m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$286
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1010:51 am
STS
- ORD
1 stop11h 08m
Alaska Airlines
Wed 3/113:54 pm
ORD
- STS
1 stop7h 58m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$290
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/246:53 pm
STS
- ORD
1 stop9h 46m
Alaska Airlines
Mon 3/307:59 pm
ORD
- STS
1 stop29h 14m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$300
This Alaska Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/307:23 am
STS
- ORD
1 stop9h 40m
Alaska Airlines
Mon 5/47:59 pm
ORD
- STS
1 stop25h 07m
Alaska Airlines
Deal found 1/27![Alaska Airlines logo]()
$303
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/306:53 pm
STS
- ORD
1 stop9h 46m
Alaska Airlines
Tue 3/314:13 pm
ORD
- STS
1 stop19h 50m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$309
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/246:53 pm
STS
- ORD
1 stop9h 46m
Alaska Airlines
Sat 4/48:20 am
ORD
- STS
1 stop13h 00m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$310
This Alaska Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/18:00 pm
STS
- ORD
1 stop21h 03m
Alaska Airlines
Mon 5/47:59 pm
ORD
- STS
1 stop16h 59m
Alaska Airlines
Deal found 1/27![Alaska Airlines logo]()
$313
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/246:53 pm
STS
- ORD
1 stop9h 46m
Alaska Airlines
Thu 4/22:09 pm
ORD
- STS
2 stops11h 50m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$315
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:37 pm
STS
- ORD
1 stop27h 22m
Alaska Airlines
Tue 3/33:54 pm
ORD
- STS
1 stop7h 58m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$319
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/257:57 pm
STS
- STL
1 stop26h 02m
Alaska Airlines
Sat 2/282:47 pm
STL
- STS
1 stop9h 05m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$330
Best flights from Santa Rosa to IllinoisDiscover carefully curated flight deals from Santa Rosa to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 30, 2026.
Discover carefully curated flight deals from Santa Rosa to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 30, 2026.
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/246:53 pm
STS
- ORD
1 stop9h 46m
Alaska Airlines
Wed 4/14:13 pm
ORD
- STS
1 stop9h 00m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$247
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/189:50 am
STS
- ORD
1 stop7h 12m
Alaska Airlines
Wed 3/254:10 pm
ORD
- STS
1 stop9h 03m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$300
This Alaska Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/307:23 am
STS
- ORD
1 stop9h 40m
Alaska Airlines
Mon 5/47:59 pm
ORD
- STS
1 stop25h 07m
Alaska Airlines
Deal found 1/27![Alaska Airlines logo]()
$303
This Alaska Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/18:00 pm
STS
- ORD
1 stop21h 03m
Alaska Airlines
Mon 5/47:59 pm
ORD
- STS
1 stop16h 59m
Alaska Airlines
Deal found 1/27![Alaska Airlines logo]()
$313
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/257:05 am
STS
- ORD
2 stops14h 54m
Alaska Airlines
Wed 4/14:13 pm
ORD
- STS
1 stop9h 00m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$315
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:37 pm
STS
- ORD
1 stop27h 22m
Alaska Airlines
Tue 3/33:54 pm
ORD
- STS
1 stop7h 58m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$319
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/98:00 am
STS
- ORD
1 stop27h 11m
Alaska Airlines
Wed 3/113:54 pm
ORD
- STS
1 stop7h 58m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$320
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:37 pm
STS
- ORD
1 stop18h 21m
Alaska Airlines
Wed 3/48:20 am
ORD
- STS
1 stop12h 42m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$323
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/78:00 am
STS
- ORD
2 stops13h 56m
Alaska Airlines
Wed 3/113:54 pm
ORD
- STS
1 stop7h 58m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$325
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/266:53 pm
STS
- ORD
1 stop9h 46m
Alaska Airlines
Wed 4/14:13 pm
ORD
- STS
1 stop9h 00m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$328
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1010:51 am
STS
- ORD
1 stop26h 07m
Alaska Airlines
Fri 3/133:54 pm
ORD
- STS
1 stop9h 56m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$329
This Alaska Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/257:57 pm
STS
- STL
1 stop26h 02m
Alaska Airlines
Sat 2/282:47 pm
STL
- STS
1 stop9h 05m
Alaska Airlines
Deal found 1/27![Alaska Airlines logo]()
$330
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/267:15 am
STS
- STL
2 stops14h 44m
Alaska Airlines
Thu 3/57:00 am
STL
- STS
1 stop18h 50m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$418
Last-minute flights from Santa Rosa to IllinoisDiscover last-minute flight deals from Santa Rosa to Illinois. Data last updated January 30, 2026 and is based on user searches.
Discover last-minute flight deals from Santa Rosa to Illinois. Data last updated January 30, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/247:57 pm
STS
- ORD
2 stops15h 14m
Alaska Airlines
Sat 2/283:54 pm
ORD
- STS
1 stop7h 58m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$334
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/257:57 pm
STS
- STL
1 stop26h 02m
Alaska Airlines
Sat 2/282:47 pm
STL
- STS
1 stop9h 05m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$330
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/257:57 pm
STS
- ORD
2 stops15h 14m
Alaska Airlines
Tue 3/33:54 pm
ORD
- STS
1 stop7h 58m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$344
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/257:57 pm
STS
- ORD
2 stops15h 14m
Alaska Airlines
Mon 3/23:54 pm
ORD
- STS
1 stop9h 56m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$354
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/267:57 pm
STS
- STL
1 stop26h 02m
Alaska Airlines
Thu 3/57:00 am
STL
- STS
1 stop18h 50m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$413
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:37 pm
STS
- ORD
1 stop27h 22m
Alaska Airlines
Tue 3/33:54 pm
ORD
- STS
1 stop7h 58m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$319
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:37 pm
STS
- ORD
1 stop18h 21m
Alaska Airlines
Wed 3/48:20 am
ORD
- STS
1 stop12h 42m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$323
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:37 pm
STS
- ORD
1 stop18h 21m
Alaska Airlines
Mon 3/23:54 pm
ORD
- STS
1 stop9h 56m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$329
One-way flights from Santa Rosa to IllinoisSearch for one-way flight options from Santa Rosa to Illinois. Find affordable one-way fares based on user searches. Data last updated January 30, 2026.
Search for one-way flight options from Santa Rosa to Illinois. Find affordable one-way fares based on user searches. Data last updated January 30, 2026.
This Alaska Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/247:23 am
STS
- ORD
1 stop27h 50m
Alaska Airlines
Deal found 1/27![Alaska Airlines logo]()
$167
This American Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/284:17 pm
STS
- ORD
1 stop6h 34m
American Airlines
Deal found 1/27![American Airlines logo]()
$195
This Alaska Airlines deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/206:50 pm
STS
- ORD
1 stop16h 21m
Alaska Airlines
Deal found 1/30![Alaska Airlines logo]()
$197
This Southwest deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1711:00 am
STS
- STL
1 stop8h 10m
Southwest
Deal found 1/29![Southwest logo]()
$240
This Alaska Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/167:34 pm
STS
- ORD
1 stop8h 46m
Alaska Airlines
Deal found 1/28![Alaska Airlines logo]()
$240
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1410:57 am
STS
- ORD
2 stops16h 03m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$267
This American Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/211:05 pm
STS
- ORD
1 stop9h 21m
American Airlines
Deal found 1/29![American Airlines logo]()
$271
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/27:05 am
STS
- ORD
2 stops14h 54m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$272
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/1510:57 am
STS
- ORD
2 stops16h 03m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1610:57 am
STS
- ORD
2 stops16h 03m
Alaska Airlines
Deal found 1/29![Alaska Airlines logo]()
$278
This Alaska Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/2811:07 am
STS
- ORD
2 stops10h 52m
Alaska Airlines
Deal found 1/27![Alaska Airlines logo]()
$282
This WAYA deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/810:36 am
STS
- STL
1 stop8h 01m
Multiple Airlines
Deal found 1/28![Multiple Airlines logo]()
$424
Find flight deals from Santa Rosa to Illinois
Keep the following information in mind while searching for Santa Rosa to Illinois flight deals. Data was last updated January 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $247 (Alaska Airlines) |
One-way from | $167 (Alaska Airlines) |
Popular in | November |
Cheapest in | February |
Average price | $385 |
Cheapflights Fare Finder
Customize your flight search to find flights from Santa Rosa to Illinois 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, Cheapflights users made 2,558,603 searches. Data last updated January 30, 2026.
Use the filters below to find and compare flights from Santa Rosa to Illinois that are best for you.
Fly from
Santa Rosa
Fly to
Illinois
Route
Depart
Return
Price
Santa RosaChicago
STS - ORD
STSORD
Santa Rosa Sonoma County
Tue 3/24
6:53 pm-6:39 am
1 stop9h 46m
Chicago O'Hare Intl
Wed 4/1
4:13 pm-11:13 pm
1 stop9h 00m
$247
Santa RosaChicago
STS - ORD
STSORD
Santa Rosa Sonoma County
Wed 3/18
9:50 am-7:02 pm
1 stop7h 12m
Chicago O'Hare Intl
Wed 3/25
4:10 pm-11:13 pm
1 stop9h 03m
$300
Santa RosaChicago
STS - ORD
STSORD
Santa Rosa Sonoma County
Thu 4/30
7:23 am-7:03 pm
1 stop9h 40m
Chicago O'Hare Intl
Mon 5/4
7:59 pm-7:06 pm
1 stop25h 07m
$303
Santa RosaChicago
STS - ORD
STSORD
Santa Rosa Sonoma County
Fri 5/1
8:00 pm-7:03 pm
1 stop21h 03m
Chicago O'Hare Intl
Mon 5/4
7:59 pm-10:58 am
1 stop16h 59m
$313
Santa RosaChicago
STS - ORD
STSORD
Santa Rosa Sonoma County
Wed 3/25
7:05 am-11:59 pm
2 stops14h 54m
Chicago O'Hare Intl
Wed 4/1
4:13 pm-11:13 pm
1 stop9h 00m
$315
Santa RosaChicago
STS - ORD
STSORD
Santa Rosa Sonoma County
Fri 2/27
6:37 pm-11:59 pm
1 stop27h 22m
Chicago O'Hare Intl
Tue 3/3
3:54 pm-9:52 pm
1 stop7h 58m
$319
Santa RosaChicago
STS - ORD
STSORD
Santa Rosa Sonoma County
Mon 3/9
8:00 am-1:11 pm
1 stop27h 11m
Chicago O'Hare Intl
Wed 3/11
3:54 pm-9:52 pm
1 stop7h 58m
$320
Santa RosaChicago
STS - ORD
STSORD
Santa Rosa Sonoma County
Fri 2/27
6:37 pm-2:58 pm
1 stop18h 21m
Chicago O'Hare Intl
Wed 3/4
8:20 am-7:02 pm
1 stop12h 42m
$323
Santa RosaChicago
STS - ORD
STSORD
Santa Rosa Sonoma County
Sat 3/7
8:00 am-11:56 pm
2 stops13h 56m
Chicago O'Hare Intl
Wed 3/11
3:54 pm-9:52 pm
1 stop7h 58m
$325
Santa RosaChicago
STS - ORD
STSORD
Santa Rosa Sonoma County
Thu 3/26
6:53 pm-6:39 am
1 stop9h 46m
Chicago O'Hare Intl
Wed 4/1
4:13 pm-11:13 pm
1 stop9h 00m
$328
Showing 1-10 of 26 results
Best time to book a flight from Santa Rosa to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Santa Rosa with our price prediction graph.
STS-ORD
STS-STL
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Santa Rosa to Illinois
STS-USIL
STS-ORD
STS-STL
What is the cheapest month to book a flight from Santa Rosa to Illinois?
Currently, April is the cheapest month in which you can book a flight from Santa Rosa to Illinois (average of $126). Flying from Santa Rosa to Illinois in December is currently the most expensive (average of $233). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated January 30, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines and American Airlines from Santa Rosa to Illinois to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.1
Crew
8.5
Entertainment
7.0
Overall
8.0
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Food
7.1
Crew
8.5
Entertainment
7.0
Overall
8.0
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Food
7.1
Crew
8.5
Entertainment
7.0
Overall
8.0
Comfort
7.8
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,Jan 2026
STS - LAX
Related info for your journey
Find useful and relevant information for your journey from Santa Rosa to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Santa Rosa to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top 2 airlines flying from Santa Rosa to Illinois
Discover the top 2 airlines that operate flights from Santa Rosa to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$292 | Average$408 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$316 | Average$578 | FlexibilityNo cancel fee | On-time71% |