Cheap flights from O'Hare Intl (ORD) to Buffalo (BUF) from $68
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 6/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
ORD — BUF
Jun 7 — Jun 141
From?
To?
1 adult, Economy
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The best prices from Chicago O'Hare Intl to Buffalo are usually found in March or September, booked 63 days in advance, depart on a Wednesday or Tuesday and return on a Saturday
Cheap flight deals from O'Hare Intl to Buffalo
Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to Buffalo (BUF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 2, 2024.
Popular in | December |
|---|---|
Cheapest in | March |
Round-trip from | $256 |
One-way from | $125 |
What is the cheapest day to fly round-trip from Chicago O'Hare Intl Airport to Buffalo?
Departing on a Tuesday is a good option for securing a great price. You can expect to save up to 28% when planning your travel around this day of the week.
How far in advance should I book a flight from Chicago O'Hare Intl Airport to Buffalo?
Find a great deal and save up to 348% by booking at least 53 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Chicago O'Hare Intl Airport to Buffalo within the next two weeks, with the cheapest ticket starting at $409.
What is the cheapest month to fly from Chicago O'Hare Intl Airport to Buffalo?
February is one of the best times of the year to fly to Buffalo from Chicago O'Hare Intl Airport. Prices for February average $310 per person but you can even find prices for as low as $142. The most expensive prices can be found in the month of December. Opting for a February flight can save you 16% on your journey compared to booking in December
What is the cheapest time of day to fly from ORD to BUF?
It’s typically best to fly out from Chicago O'Hare Intl Airport to Buffalo in the evening. Doing so could potentially save you 8% on the flight price compared to flying in the morning, which is usually more expensive.
Cheap American Airlines flights from O'Hare Intl to Buffalo
Explore cheap flight options specifically provided by American Airlines for the route between O'Hare Intl and Buffalo. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,807,690 searches. Data last updated June 2, 2024.
Peruse some of the lowest-priced American Airlines flights we've found from Chicago to Buffalo. Make sure to check back often as deals are often changing.
Fri 6/218:27 pmORD - BUF
Nonstop1h 36mAmerican Airlines
Tue 6/2510:39 amBUF - ORD
1 stop8h 04mAmerican Airlines
Deal found 5/31$230
Mon 7/18:27 pmORD - BUF
Nonstop1h 36mAmerican Airlines
Fri 7/55:08 pmBUF - ORD
Nonstop1h 52mAmerican Airlines
Deal found 6/2$249
Fri 6/288:27 pmORD - BUF
Nonstop1h 36mAmerican Airlines
Mon 7/18:15 amBUF - ORD
Nonstop1h 50mAmerican Airlines
Deal found 6/1$257
Thu 8/293:09 pmORD - BUF
Nonstop1h 31mAmerican Airlines
Sat 8/317:44 amBUF - ORD
Nonstop1h 49mAmerican Airlines
Deal found 6/1$262
Thu 8/16:33 pmORD - BUF
Nonstop1h 50mAmerican Airlines
Mon 8/58:00 amBUF - ORD
Nonstop1h 52mAmerican Airlines
Deal found 6/1$269
Sat 6/155:07 amORD - BUF
1 stop5h 51mAmerican Airlines
Sat 6/226:17 pmBUF - ORD
Nonstop1h 49mAmerican Airlines
Deal found 6/1$270
Fri 6/218:27 pmORD - BUF
Nonstop1h 36mAmerican Airlines
Mon 6/244:36 pmBUF - ORD
Nonstop1h 49mAmerican Airlines
Deal found 5/31$277
Sat 6/158:27 pmORD - BUF
Nonstop1h 36mAmerican Airlines
Thu 8/15:08 pmBUF - ORD
Nonstop1h 52mAmerican Airlines
Deal found 5/31$292
Thu 6/278:27 pmORD - BUF
Nonstop1h 36mAmerican Airlines
Sat 6/298:00 amBUF - ORD
Nonstop1h 50mAmerican Airlines
Deal found 6/1$295
Cheap JetBlue flights from O'Hare Intl to Buffalo
Explore cheap flight options specifically provided by JetBlue for the route between O'Hare Intl and Buffalo. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,807,690 searches. Data last updated June 2, 2024.
Have a look at some of the cheapest available JetBlue flights departing from Chicago and landing in Buffalo. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.
Tue 7/168:40 amORD - BUF
1 stop5h 34mJetBlue
Wed 7/2411:15 amBUF - ORD
1 stop7h 28mJetBlue
Deal found 6/1$226
Tue 7/210:35 amORD - BUF
1 stop4h 30mJetBlue
Thu 7/411:15 amBUF - ORD
1 stop7h 28mJetBlue
Deal found 6/2$250
Sat 7/2010:30 amORD - BUF
1 stop5h 39mJetBlue
Wed 7/2411:15 amBUF - ORD
1 stop7h 28mJetBlue
Deal found 6/1$261
Thu 6/276:38 pmORD - BUF
1 stop25h 02mJetBlue
Mon 7/111:15 amBUF - ORD
1 stop7h 28mJetBlue
Deal found 6/2$273
Sat 6/2910:35 amORD - BUF
1 stop4h 30mJetBlue
Thu 7/411:15 amBUF - ORD
1 stop7h 28mJetBlue
Deal found 6/1$285
Tue 6/115:32 pmORD - BUF
1 stop5h 40mJetBlue
Tue 6/185:33 amBUF - ORD
1 stop5h 17mJetBlue
Deal found 5/31$327
Tue 6/115:32 pmORD - BUF
1 stop5h 40mJetBlue
Thu 6/1311:15 amBUF - ORD
1 stop7h 28mJetBlue
Deal found 5/31$353
Mon 6/105:32 pmORD - BUF
1 stop5h 40mJetBlue
Tue 6/185:33 amBUF - ORD
1 stop5h 17mJetBlue
Deal found 5/31$358
Mon 6/105:32 pmORD - BUF
1 stop5h 40mJetBlue
Thu 6/1311:15 amBUF - ORD
1 stop7h 28mJetBlue
Deal found 5/31$384
Cheap O'Hare Intl to Buffalo flights in June & July 2024
Find cheap flight options from O'Hare Intl to Buffalo specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,807,690 searches. Prices were last updated on June 2, 2024.
These are some of the best deals we've found on flights to Buffalo in 2024 at this time. Check back soon for alternative fares.
Wed 6/128:00 amORD - BUF
1 stop4h 45mFrontier
Wed 6/192:46 pmBUF - ORD
1 stop5h 14mFrontier
Deal found 5/31$134
Tue 6/118:00 amORD - BUF
1 stop10h 53mFrontier
Wed 6/192:46 pmBUF - ORD
1 stop5h 14mFrontier
Deal found 5/31$137
Wed 6/128:00 amORD - BUF
1 stop4h 45mFrontier
Mon 6/172:46 pmBUF - ORD
1 stop5h 14mFrontier
Deal found 5/31$145
Tue 6/118:00 amORD - BUF
1 stop10h 53mFrontier
Mon 6/172:46 pmBUF - ORD
1 stop5h 14mFrontier
Deal found 5/31$147
Fri 6/78:00 amORD - BUF
1 stop4h 45mFrontier
Wed 6/122:46 pmBUF - ORD
1 stop4h 59mFrontier
Deal found 6/1$158
Tue 6/258:00 amORD - BUF
1 stop10h 53mFrontier
Wed 6/262:46 pmBUF - ORD
1 stop5h 14mFrontier
Deal found 5/31$159
Fri 6/78:00 amORD - BUF
1 stop4h 45mFrontier
Sat 6/810:54 pmBUF - ORD
1 stop26h 46mFrontier
Deal found 6/1$160
Wed 6/268:00 amORD - BUF
1 stop4h 45mMultiple Airlines
Fri 7/52:00 pmBUF - ORD
1 stop6h 39mMultiple Airlines
Deal found 6/1$173
Tue 6/118:00 amORD - BUF
1 stop10h 53mFrontier
Sat 6/1510:54 pmBUF - ORD
1 stop26h 46mFrontier
Deal found 5/31$176
O'Hare Intl to Buffalo 2024 flight deals
Discover exclusive flight deals for travel between O'Hare Intl and Buffalo in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,807,690 searches. Data last updated June 2, 2024.
These are some of the best deals we've found on flights to Buffalo in 2024 at this time. Check back soon for alternative fares.
Wed 6/128:00 amORD - BUF
1 stop4h 45mFrontier
Wed 6/192:46 pmBUF - ORD
1 stop5h 14mFrontier
Deal found 5/31$134
Tue 6/118:00 amORD - BUF
1 stop10h 53mFrontier
Wed 6/192:46 pmBUF - ORD
1 stop5h 14mFrontier
Deal found 5/31$137
Wed 6/128:00 amORD - BUF
1 stop4h 45mFrontier
Mon 6/172:46 pmBUF - ORD
1 stop5h 14mFrontier
Deal found 5/31$145
Tue 6/118:00 amORD - BUF
1 stop10h 53mFrontier
Mon 6/172:46 pmBUF - ORD
1 stop5h 14mFrontier
Deal found 5/31$147
Wed 7/178:05 amORD - BUF
1 stop4h 42mFrontier
Wed 7/242:47 pmBUF - ORD
1 stop4h 56mFrontier
Deal found 6/1$157
Fri 6/78:00 amORD - BUF
1 stop4h 45mFrontier
Wed 6/122:46 pmBUF - ORD
1 stop4h 59mFrontier
Deal found 6/1$158
Tue 6/258:00 amORD - BUF
1 stop10h 53mFrontier
Wed 6/262:46 pmBUF - ORD
1 stop5h 14mFrontier
Deal found 5/31$159
Fri 6/78:00 amORD - BUF
1 stop4h 45mFrontier
Sat 6/810:54 pmBUF - ORD
1 stop26h 46mFrontier
Deal found 6/1$160
Wed 6/268:00 amORD - BUF
1 stop4h 45mMultiple Airlines
Fri 7/52:00 pmBUF - ORD
1 stop6h 39mMultiple Airlines
Deal found 6/1$173
Non-stop flights to Buffalo from O'Hare Intl
Discover non-stop flight options from O'Hare Intl to Buffalo. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 2,807,690 searches. Data last updated June 2, 2024.
For a shorter flight, select one of these non-stop flights from Chicago to Buffalo. Users can also choose from other Chicago to Buffalo flights by using the search form above.
Wed 6/269:20 pmORD - BUF
Nonstop1h 39mUnited Airlines
Sat 6/297:00 amBUF - ORD
Nonstop1h 52mUnited Airlines
Deal found 6/1$205
Fri 6/218:27 pmORD - BUF
Nonstop1h 36mAmerican Airlines
Tue 6/254:36 pmBUF - ORD
Nonstop1h 49mAmerican Airlines
Deal found 5/31$229
Mon 7/18:27 pmORD - BUF
Nonstop1h 36mAmerican Airlines
Fri 7/55:08 pmBUF - ORD
Nonstop1h 52mAmerican Airlines
Deal found 6/2$249
Wed 7/102:17 pmORD - BUF
Nonstop1h 40mUnited Airlines
Wed 7/176:03 pmBUF - ORD
Nonstop1h 52mUnited Airlines
Deal found 6/1$253
Fri 6/288:27 pmORD - BUF
Nonstop1h 36mAmerican Airlines
Mon 7/18:15 amBUF - ORD
Nonstop1h 50mAmerican Airlines
Deal found 6/1$257
Thu 8/87:24 pmORD - BUF
Nonstop1h 33mAmerican Airlines
Wed 8/146:30 pmBUF - ORD
Nonstop1h 50mAmerican Airlines
Deal found 6/1$259
Sat 6/159:20 pmORD - BUF
Nonstop1h 39mUnited Airlines
Sat 6/227:00 amBUF - ORD
Nonstop1h 51mUnited Airlines
Deal found 6/1$260
Thu 8/293:09 pmORD - BUF
Nonstop1h 31mAmerican Airlines
Sat 8/317:44 amBUF - ORD
Nonstop1h 49mAmerican Airlines
Deal found 6/1$262
Fri 6/289:15 pmORD - BUF
Nonstop1h 41mUnited Airlines
Sat 7/67:00 amBUF - ORD
Nonstop1h 50mUnited Airlines
Deal found 6/2$267
O'Hare Intl to Buffalo flights leaving soon
Find last-minute flight options from O'Hare Intl to Buffalo for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,807,690 searches. Data last updated June 2, 2024.
Users seeking a last-minute flight from Chicago to Buffalo should consider booking one of these fares. Tip: verify your flight details before completing your reservation.
Wed 6/128:00 amORD - BUF
1 stop4h 45mFrontier
Wed 6/192:46 pmBUF - ORD
1 stop5h 14mFrontier
Deal found 5/31$134
Tue 6/118:00 amORD - BUF
1 stop10h 53mFrontier
Wed 6/192:46 pmBUF - ORD
1 stop5h 14mFrontier
Deal found 5/31$137
Wed 6/128:00 amORD - BUF
1 stop4h 45mFrontier
Mon 6/172:46 pmBUF - ORD
1 stop5h 14mFrontier
Deal found 5/31$145
Tue 6/118:00 amORD - BUF
1 stop10h 53mFrontier
Mon 6/172:46 pmBUF - ORD
1 stop5h 14mFrontier
Deal found 5/31$147
Fri 6/78:00 amORD - BUF
1 stop4h 45mFrontier
Wed 6/122:46 pmBUF - ORD
1 stop4h 59mFrontier
Deal found 6/1$158
Fri 6/78:00 amORD - BUF
1 stop4h 45mFrontier
Sat 6/810:54 pmBUF - ORD
1 stop26h 46mFrontier
Deal found 6/1$160
Tue 6/118:00 amORD - BUF
1 stop10h 53mFrontier
Sat 6/1510:54 pmBUF - ORD
1 stop26h 46mFrontier
Deal found 5/31$176
Sat 6/88:00 amORD - BUF
1 stop9h 37mFrontier
Wed 6/122:46 pmBUF - ORD
1 stop4h 59mFrontier
Deal found 6/1$202
Tue 6/118:00 amORD - BUF
1 stop10h 53mFrontier
Fri 6/142:46 pmBUF - ORD
1 stop5h 14mFrontier
Deal found 5/31$216
One-way flights to Buffalo from O'Hare Intl
Search for one-way flight options from O'Hare Intl to Buffalo. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,807,690 searches. Data last updated June 2, 2024.
Take a look at some of the one-way flights we've detected from Chicago to Buffalo. Those needing a return flight from Chicago to Buffalo can use the search form above.
Tue 6/118:00 amORD - BUF
1 stop10h 53mFrontier
Deal found 6/1$68
Wed 6/268:00 amORD - BUF
1 stop4h 45mFrontier
Deal found 6/2$80
Sat 6/228:27 pmORD - BUF
Nonstop1h 36mAmerican Airlines
Deal found 6/1$103
Fri 6/218:00 amORD - BUF
1 stop4h 45mFrontier
Deal found 6/1$104
Mon 7/18:00 amORD - BUF
1 stop4h 45mFrontier
Deal found 6/1$105
Mon 8/128:00 amORD - BUF
1 stop4h 42mFrontier
Deal found 6/1$108
Thu 7/46:30 pmORD - BUF
1 stop17h 30mSun Country Air
Deal found 6/2$115
Tue 7/210:35 amORD - BUF
1 stop4h 30mJetBlue
Deal found 6/2$125
Tue 8/63:09 pmORD - BUF
Nonstop1h 31mAmerican Airlines
Deal found 6/2$126
Find flights from O'Hare Intl to Buffalo within your budget
Customize your flight search to find flights from O'Hare Intl to Buffalo 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 2,807,690 searches. Data last updated June 2, 2024.
Fly from
Any airport
Fly to
Any airport
Budget
$134 - $255
Route
Depart
Return
Price
Chicago O'Hare IntlBuffalo
ORD - BUF
ORDBUF
Chicago O'Hare Intl
Wed 6/12
1 stop4h 45m
Buffalo
Wed 6/19
1 stop5h 14m
$134
Chicago O'Hare IntlBuffalo
ORD - BUF
ORDBUF
Chicago O'Hare Intl
Wed 6/12
1 stop4h 45m
Buffalo
Mon 6/17
1 stop5h 14m
$145
Chicago O'Hare IntlBuffalo
ORD - BUF
ORDBUF
Chicago O'Hare Intl
Wed 7/17
1 stop4h 42m
Buffalo
Wed 7/24
1 stop4h 56m
$157
Chicago O'Hare IntlBuffalo
ORD - BUF
ORDBUF
Chicago O'Hare Intl
Wed 6/26
1 stop4h 45m
Buffalo
Fri 7/5
1 stop6h 39m
$173
Chicago O'Hare IntlBuffalo
ORD - BUF
ORDBUF
Chicago O'Hare Intl
Wed 6/26
Nonstop1h 39m
Buffalo
Sat 6/29
Nonstop1h 52m
$205
Chicago O'Hare IntlBuffalo
ORD - BUF
ORDBUF
Chicago O'Hare Intl
Tue 7/16
1 stop5h 34m
Buffalo
Wed 7/24
1 stop7h 28m
$226
Chicago O'Hare IntlBuffalo
ORD - BUF
ORDBUF
Chicago O'Hare Intl
Fri 6/21
Nonstop1h 36m
Buffalo
Tue 6/25
1 stop8h 04m
$230
Chicago O'Hare IntlBuffalo
ORD - BUF
ORDBUF
Chicago O'Hare Intl
Wed 6/26
1 stop3h 43m
Buffalo
Sat 6/29
1 stop4h 06m
$248
Chicago O'Hare IntlBuffalo
ORD - BUF
ORDBUF
Chicago O'Hare Intl
Sun 6/16
1 stop4h 39m
Buffalo
Thu 6/20
1 stop8h 29m
$255
How far ahead should I book a flight from Chicago O'Hare Intl Airport to Buffalo?
Use this chart to determine the optimal time to book a round-trip flight from O'Hare Intl to Buffalo. Price data was last updated on May 31, 2024.
The price you pay for your flight from Chicago O'Hare Intl Airport to Buffalo may vary depending on when you book. For the best chance of a lower fare, look to book 63 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest day to fly from Chicago O'Hare Intl Airport to Buffalo?
Use this chart to determine the cheapest time to fly round-trip from O'Hare Intl to Buffalo. Price data was last updated on May 26, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to Buffalo flight should consider departing on Wednesday at noon when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Best time to book a flight from O'Hare Intl to Buffalo
Have a flexible travel schedule? Discover the best time to fly to Buffalo from O'Hare Intl with our price prediction graph.
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.
Temperature and rainfall in Buffalo by month
Plan your trip to Buffalo by taking into account the average temperature and rainfall totals by month.
BUF Temperature | 24.8 - 71.6 °F |
|---|
Reviews of airlines servicing Buffalo
Get insights into the airlines that provide service to Buffalo. 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 Buffalo. Reviews last updated June 2, 2024.
To help decide which airline to fly from Chicago to Buffalo, see what other customers have to say about American Airlines, JetBlue and Frontier. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
10,402 reviews
Overall
8.0
Entertainment
8.0
Food
7.4
Comfort
7.9
Boarding
8.2
Crew
8.6
Reviews
1 / 10
On time flights; courteous staff; efficient boarding system! Thank you!
10,402 reviews
10,402 reviews
Overall
8.0
Entertainment
8.0
Food
7.4
Comfort
7.9
Boarding
8.2
Crew
8.6
Reviews
1 / 10
On time flights; courteous staff; efficient boarding system! Thank you!
4,346 reviews
10,402 reviews
Overall
8.0
Entertainment
8.0
Food
7.4
Comfort
7.9
Boarding
8.2
Crew
8.6
Reviews
1 / 10
On time flights; courteous staff; efficient boarding system! Thank you!
10,755 reviews
10,402 reviews
Overall
8.0
Entertainment
8.0
Food
7.4
Comfort
7.9
Boarding
8.2
Crew
8.6
Reviews
1 / 10
On time flights; courteous staff; efficient boarding system! Thank you!
14,260 reviews
10,402 reviews
Overall
8.0
Entertainment
8.0
Food
7.4
Comfort
7.9
Boarding
8.2
Crew
8.6
Reviews
1 / 10
On time flights; courteous staff; efficient boarding system! Thank you!
592 reviews
10,402 reviews
Overall
8.0
Entertainment
8.0
Food
7.4
Comfort
7.9
Boarding
8.2
Crew
8.6
Reviews
1 / 10
On time flights; courteous staff; efficient boarding system! Thank you!
Related info for your journey
Find useful and relevant information for your journey from O'Hare Intl to Buffalo. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for O'Hare Intl to BuffaloSee prices for flight routes from nearby airports that may be better suited for you.
See prices for flight routes from nearby airports that may be better suited for you.
Top 3 airlines flying from O'Hare Intl to Buffalo
Discover the top 3 airlines that operate flights from O'Hare Intl to Buffalo. 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 2,807,690 searches. Data last updated June 2, 2024.
Search flights from O'Hare Intl to Buffalo by cabin class
Find flights from O'Hare Intl to Buffalo, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Hourly flight availability from O'Hare Intl to Buffalo
Find hourly flight availability from O'Hare Intl to Buffalo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 2, 2024.
| 1%of flight departures | Early morningMidnight to 6 am |
|---|---|
| 23%of flight departures | Morning6 am to noon |
| 67%of flight departures | AfternoonNoon to 6 pm |
| 9%of flight departures | Evening6 pm to midnight |
Midnight
6 AM
Noon
6 PM
Weekly flight availability from O'Hare Intl to Buffalo
Explore weekly flight availability from O'Hare Intl to Buffalo. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 2, 2024.
| Sunday | 18daily flights |
|---|---|
| Monday | 22daily flights |
| Tuesday | 7daily flights |
| Wednesday | 7daily flights |
| Thursday | 8daily flights |
| Friday | 20daily flights |
| Saturday | 11daily flights |
Book a flight to one of these trending destinations
User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Fly with Cheapflights
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Certainly. Search results for flights to Buffalo from O'Hare Intl shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.
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