Flights from Chicago to South Central Montana

Cheapest flights from Chicago

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jul 15 - Tue, Jul 22

ORD

O'Hare Intl.

BIL

Logan Intl.

$217 Roundtrip, found 3 days ago

$217

Roundtrip

found 3 days ago

Select Delta flight, departing Tue, Jul 15 from O'Hare Intl. to Logan Intl., returning Tue, Jul 22, priced at $217 found 3 days ago

Wed, Jul 16 - Tue, Jul 22

ORD

O'Hare Intl.

BIL

Logan Intl.

$233 Roundtrip, found 3 days ago

$233

Roundtrip

found 3 days ago

Select Delta flight, departing Wed, Jul 16 from O'Hare Intl. to Logan Intl., returning Tue, Jul 22, priced at $233 found 3 days ago

Fri, Jul 18 - Tue, Jul 22

ORD

O'Hare Intl.

BIL

Logan Intl.

$238 Roundtrip, found 3 days ago

$238

Roundtrip

found 3 days ago

Select Delta flight, departing Fri, Jul 18 from O'Hare Intl. to Logan Intl., returning Tue, Jul 22, priced at $238 found 3 days ago

Tue, Jul 15 - Thu, Jul 24

ORD

O'Hare Intl.

BIL

Logan Intl.

$281 Roundtrip, found 3 days ago

$281

Roundtrip

found 3 days ago

Select American Airlines flight, departing Tue, Jul 15 from O'Hare Intl. to Logan Intl., returning Thu, Jul 24, priced at $281 found 3 days ago

Fri, Jul 18 - Thu, Jul 24

ORD

O'Hare Intl.

BIL

Logan Intl.

$290 Roundtrip, found 3 days ago

$290

Roundtrip

found 3 days ago

Select American Airlines flight, departing Fri, Jul 18 from O'Hare Intl. to Logan Intl., returning Thu, Jul 24, priced at $290 found 3 days ago

Tue, Jul 15 - Sat, Jul 26

ORD

O'Hare Intl.

BIL

Logan Intl.

$308 Roundtrip, found 3 days ago

$308

Roundtrip

found 3 days ago

Select Delta flight, departing Tue, Jul 15 from O'Hare Intl. to Logan Intl., returning Sat, Jul 26, priced at $308 found 3 days ago

Wed, Jul 16 - Thu, Jul 24

ORD

O'Hare Intl.

BIL

Logan Intl.

$310 Roundtrip, found 3 days ago

$310

Roundtrip

found 3 days ago

Select United flight, departing Wed, Jul 16 from O'Hare Intl. to Logan Intl., returning Thu, Jul 24, priced at $310 found 3 days ago

Mon, Jul 21 - Tue, Jul 22

ORD

O'Hare Intl.

BIL

Logan Intl.

$313 Roundtrip, found 3 days ago

$313

Roundtrip

found 3 days ago

Select Delta flight, departing Mon, Jul 21 from O'Hare Intl. to Logan Intl., returning Tue, Jul 22, priced at $313 found 3 days ago

Tue, Jul 15 - Sun, Jul 20

ORD

O'Hare Intl.

BIL

Logan Intl.

$315 Roundtrip, found 3 days ago

$315

Roundtrip

found 3 days ago

Select American Airlines flight, departing Tue, Jul 15 from O'Hare Intl. to Logan Intl., returning Sun, Jul 20, priced at $315 found 3 days ago

Fri, Aug 29 - Sat, Aug 30

ORD

O'Hare Intl.

BIL

Logan Intl.

$319 Roundtrip, found 1 day ago

$319

Roundtrip

found 1 day ago

Select United flight, departing Fri, Aug 29 from O'Hare Intl. to Logan Intl., returning Sat, Aug 30, priced at $319 found 1 day ago

Wed, Jul 16 - Sat, Jul 26

ORD

O'Hare Intl.

BIL

Logan Intl.

$324 Roundtrip, found 3 days ago

$324

Roundtrip

found 3 days ago

Select Delta flight, departing Wed, Jul 16 from O'Hare Intl. to Logan Intl., returning Sat, Jul 26, priced at $324 found 3 days ago

Fri, Jul 18 - Sun, Jul 20

ORD

O'Hare Intl.

BIL

Logan Intl.

$324 Roundtrip, found 3 days ago

$324

Roundtrip

found 3 days ago

Select American Airlines flight, departing Fri, Jul 18 from O'Hare Intl. to Logan Intl., returning Sun, Jul 20, priced at $324 found 3 days ago

Wed, Jul 16 - Mon, Jul 21

ORD

O'Hare Intl.

BIL

Logan Intl.

$329 Roundtrip, found 3 days ago

$329

Roundtrip

found 3 days ago

Select United flight, departing Wed, Jul 16 from O'Hare Intl. to Logan Intl., returning Mon, Jul 21, priced at $329 found 3 days ago

Fri, Aug 29 - Sat, Aug 30

ORD

O'Hare Intl.

BIL

Logan Intl.

$329 Roundtrip, found 1 day ago

$329

Roundtrip

found 1 day ago

Select American Airlines flight, departing Fri, Aug 29 from O'Hare Intl. to Logan Intl., returning Sat, Aug 30, priced at $329 found 1 day ago

Fri, Aug 29 - Sat, Aug 30

ORD

O'Hare Intl.

BIL

Logan Intl.

$359 Roundtrip, found 1 day ago

$359

Roundtrip

found 1 day ago

Select United flight, departing Fri, Aug 29 from O'Hare Intl. to Logan Intl., returning Sat, Aug 30, priced at $359 found 1 day ago

Thu, Jul 17 - Thu, Jul 24

ORD

O'Hare Intl.

BIL

Logan Intl.

$361 Roundtrip, found 3 days ago

$361

Roundtrip

found 3 days ago

Select American Airlines flight, departing Thu, Jul 17 from O'Hare Intl. to Logan Intl., returning Thu, Jul 24, priced at $361 found 3 days ago

Tue, Jul 15 - Mon, Jul 21

ORD

O'Hare Intl.

BIL

Logan Intl.

$364 Roundtrip, found 3 days ago

$364

Roundtrip

found 3 days ago

Select Delta flight, departing Tue, Jul 15 from O'Hare Intl. to Logan Intl., returning Mon, Jul 21, priced at $364 found 3 days ago

Fri, Aug 29 - Sat, Aug 30

ORD

O'Hare Intl.

BIL

Logan Intl.

$364 Roundtrip, found 1 day ago

$364

Roundtrip

found 1 day ago

Select Alaska Airlines flight, departing Fri, Aug 29 from O'Hare Intl. to Logan Intl., returning Sat, Aug 30, priced at $364 found 1 day ago

Thu, Jul 17 - Tue, Jul 22

ORD

O'Hare Intl.

BIL

Logan Intl.

$368 Roundtrip, found 3 days ago

$368

Roundtrip

found 3 days ago

Select Delta flight, departing Thu, Jul 17 from O'Hare Intl. to Logan Intl., returning Tue, Jul 22, priced at $368 found 3 days ago

Fri, Aug 29 - Sat, Aug 30

ORD

O'Hare Intl.

BIL

Logan Intl.

$369 Roundtrip, found 1 day ago

$369

Roundtrip

found 1 day ago

Select United flight, departing Fri, Aug 29 from O'Hare Intl. to Logan Intl., returning Sat, Aug 30, priced at $369 found 1 day ago