How can I find cheap flights from Chicago Rockford International Airport to Portsmouth International Airport?
Find the cheapest Chicago to Boston flights over the next 3 months. One-way fares from NZD 429, return fares from NZD 429.
- Cheapest
- Fastest
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RFD 15:3424h 37m1 stopPSM 17:11Chicago - Boston | Tue, Nov 17 | Allegiant AirNZD 429 NZD 58827% off27% offNZD 588 NZD 429
CHI 13:0017h 25m1 stopBOS 14:00Chicago - Boston | Wed, Nov 11 | Normal AirlineFind more flightsFind more flights
RFD 15:3424h 37m1 stopPSM 17:11Chicago - Boston | Tue, Nov 17 | Allegiant AirNZD 429 NZD 58827% off27% offNZD 588 NZD 429
CHI 13:0017h 25m1 stopBOS 14:00Chicago - Boston | Wed, Nov 11 | Normal AirlineFind more flightsFind more flights
Displayed flight fares from Chicago to Boston are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.
Which airline offers the cheapest flights from Chicago Rockford International Airport to Portsmouth International Airport?
The cheapest airline flying from Chicago Rockford International Airport to Portsmouth International Airport is Allegiant Air (from NZD 429) among 1 carriers operating this route. Based on Trip.com's latest 7-day flight data.

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About Chicago Rockford International Airport and Portsmouth International Airport
Learn about Chicago Rockford International Airport (RFD) and Portsmouth International Airport (PSM) — including location, terminals, transportation, and travel tips.
| Flight distance | 1,499.51km |
|---|---|
| Cheapest one-way ticket price | NZD 429 |
FAQs for Chicago Rockford International Airport to Portsmouth International Airport Flights
What is the average price of a flight from Chicago Rockford International Airport to Portsmouth International Airport?
Based on Trip.com flight data for departures within the next 30 days with at most one stop, the average one-way price from Chicago Rockford International Airport to Portsmouth International Airport is NZD 428. Prices may vary depending on the departure date, airline, and availability.How do I book flights from Chicago Rockford International Airport to Portsmouth International Airport on Trip.com?
Enter Chicago Rockford International Airport and Portsmouth International Airport, select your departure date and number of passengers, then compare flights by price, flight duration, and baggage allowance. Once you've chosen a fare, review the change and refund rules, fill in passenger details, and pay to receive your booking confirmation.
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Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.